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Revision rhinoplasty

Between 5% and 15% of rhinoplasties are done again, and the published series say the second operation is a different problem from the first: the cartilage is gone, the skin is scarred and less able to survive, and the airway is usually part of the complaint. The commonest reasons for coming back, too little tip rotation, a hanging columella and fullness above the tip, trace to technique choices made in the primary. The literature is almost entirely single-surgeon and retrospective, and its strongest finding is preventive: which patients will return can be partly predicted before the first operation.

Where these 181 papers were published

  • 52Plastic and Reconstructive SurgeryPlast Reconstr Surg
  • 32Aesthetic Plastic SurgeryAesthetic Plast Surg
  • 27Facial Plastic SurgeryFacial Plast Surg
  • 21Aesthetic Surgery JournalAesthet Surg J
  • 17Plastic and Reconstructive Surgery Global OpenPlast Reconstr Surg Glob Open
  • 11Facial Plastic Surgery Clinics of North AmericaFacial Plast Surg Clin North Am
  • 10Facial Plastic Surgery and Aesthetic MedicineFacial Plast Surg Aesthet Med
  • 7JAMA Facial Plastic SurgeryJAMA Facial Plast Surg
  • 4Clinics in Plastic SurgeryClin Plast Surg

27 further papers on this topic came in through the history rather than the archive query: Millard DR 1969, Sheen JH 1975, Farkas LG 1985, Gunter JP 1987 and 23 more. They are counted on the landmark papers, not here.

What repeats

Six findings reported by independent groups in different countries. Each card carries the papers it rests on.

10.8% came back, and the three commonest reasons were the same three

Screening 252 revisions after open rhinoplasty in one practice, the revision rate was 10.8% and the reasons clustered: insufficient tip rotation (37.7%), hanging columella (30.2%) and supratip deformity (28.6%). The regression is the useful part. Using a columellar strut instead of a tongue-in-groove fixation multiplied the risk of inadequate rotation 5.3-fold, of hanging columella 5.9-fold and of supratip deformity 2.2-fold; being over 40 multiplied hanging columella 6.8-fold, and low tip projection before surgery doubled the rotation risk. Most of this list is decided in the first operation, not discovered in the second.

Rests on: Sibar et al., 252 revisions and their risk factors.

The revision patient usually cannot breathe either

Reviewing 46 consecutive revisions whose main complaint was obstruction, 91.3% had airway obstruction from a deviated septum or nasal valve dysfunction; grafts were placed in 89.1%, septoplasty done in 76.1%, lateral wall support in 47.8% and spreader grafts in 39.1%, and the obstruction score improved from the first month. Purely cosmetic revision is the minority presentation in the published series. The same pattern holds in cleft patients: secondary cleft rhinoplasty improved obstruction scores, with lateral crural strut grafting associated with the improvement and alar revision associated with the opposite.

Rests on: Goudakos et al., 46 revisions with obstruction · Carlson et al., airway after secondary cleft rhinoplasty.

The second operation runs out of cartilage, and rib is the answer

Septal cartilage is usually gone by the revision, so the question is where the framework comes from. Fresh frozen homologous rib in 226 revisions over nine years gave a 2.7% infection rate, most managed with antibiotics alone; a separate 123-case series reported 2.4% infection and 0.8% resorption with improvement across every patient-reported measure; non-irradiated homologous rib in 26 patients gave a 3.6% graft complication rate with no warping. Autologous rib warps, and one series found the external cause: an incompletely removed hump underneath, bending the graft in the sagittal plane. Layered constructions built to defeat warping (perichondrium, rib lamina and fascia in one sandwich) are now reported in more than 300 cases by a single surgeon.

Rests on: Rohrich et al., 226 fresh frozen rib revisions · Taylor and Barrera, 123 cases · Rogal et al., non-irradiated homologous rib · Xu et al., why cartilage warps · Robotti et al., the SPLF graft in 300 cases.

The nose contracted around a silicone implant is a category of its own

In East Asian practice the commonest revision is not a reduction gone wrong but an implant that has to come out, leaving a short, hard, contracted nose. Three answers are published. Cross-linked acellular dermal matrix for the dorsum with autologous cartilage at the tip in 56 patients moved outcome scores from 31.7 to 81.4 at a year, with one infection and three excessive resorptions. Molded, glued diced costal cartilage in 28 patients after failed silicone was rated good or excellent in 91.1%. And adipose-derived stromal vascular fraction injected around a severely contracted nose lengthened it more than saline in a controlled comparison of 40 patients.

Rests on: Kook et al., acellular dermal matrix in 56 · Fung et al., glued diced cartilage after silicone · Ahn et al., stromal vascular fraction for contracture.

The skin is the tissue that limits the operation

Of 384 open rhinoplasties by one surgeon, 27 (7%) developed skin compromise needing unplanned treatment, and 25 of those 27 were revisions. Age, smoking and the number of previous operations all predicted it, and the revision rate in that group was 22.2%. Two other findings point the same way: bacterial biofilms and persister cells were found in nasal soft tissue in revision patients with no implant present, and Semmes-Weinstein testing showed revision patients still had reduced sensation at the tip, infratip and columellar base at twelve months, where primary patients had recovered.

Rests on: Irvine et al., skin compromise in 384 rhinoplasties · Kao et al., biofilms in revision tissue · Akyigit et al., sensation at twelve months.

Who will come back is partly visible before the first operation

One question on a validated survey, decreased mood and self-esteem because of my nose, separated a 16.7% to 18.8% revision rate from a 0% revision rate in 148 cosmetic patients. Patients carrying a psychiatric diagnosis went on to a further operation at 18% against 12% in a 961-patient institutional cohort. And aesthetic satisfaction sits below aesthetic expectation at every interval past a year, while functional satisfaction exceeds it. A revision request is often an expectation that was never matched, which is why the staging systems proposed for revision include a category for the patient's expectations alongside the anatomy.

Rests on: Okland et al., nasal self-esteem predicts revision · Tie et al., psychiatric diagnoses and revision · Kandathil et al., expectation against satisfaction · Rodman and Kridel, a staging system · and the psychology of rhinoplasty.

By problem

Revision is not one operation. What the papers on file report for each presenting problem.

Rotation, projection and the hanging columella

The three commonest aesthetic reasons for a second operation, and the ones most clearly traceable to the first. Fixing the tip to the septum, the tongue-in-groove, carried lower risk than a floating strut across all three in the 252-case analysis. Where the tip has to be rebuilt rather than repositioned, a Y-shaped auricular strut raised the nasolabial angle in 37 primary and revision patients with no negative outcomes in the revision group.

Key papers: Sibar et al. · Martino et al., Y-columellar strut.

The dorsum: irregularity, warping and the saddle nose

Rebuilding a dorsum that has been over-resected or has warped is the technical centre of revision. Solid rib warps and diced cartilage in fascia loses definition, which is the argument for layered constructions; an embed-in graft is described specifically to rescue cartilage that has already warped. For the collapsed dorsum, a 60-patient algorithm sorts saddle deformity into four types by severity, notes septal perforation in 10% and lining condition as decisive, and reports the first use of hyaluronic acid filler to expand contracted skin before reconstructing under it.

Key papers: Robotti et al. · Robotti et al., refinements · Xu et al. · Battista et al., saddle nose algorithm.

The contracted nose after an implant

Silicone augmentation with tip work is the commonest primary operation in parts of Asia, and its failures (capsular contracture, a short hard nose, notching, pinching, alar retraction, external valve collapse) are the commonest revision there. The published sequence is remove the implant, the capsule and the scar, then rebuild the dorsum with autologous or biological material and the tip with cartilage.

Key papers: Kook et al., acellular dermal matrix · Fung et al. · Ahn et al. · Kook et al., lateral crural strut in 37 secondary cases.

Tip deformities after previous tip surgery

Notching, pinching, retraction, deviation, cephalic malposition. Lateral crural strut grafts corrected all of these subgroups in 37 Asian secondary cases, with the largest gain in lateral crural deformities and the smallest in tip deviation. Repositioning and reconstructing the lateral crus in 42 revisions improved obstruction and cosmesis scores at three and eleven months and improved measured sidewall collapse.

Key papers: Kook et al. · Abdelhamid et al., repositioning in 42 revisions.

Alar retraction, the nostril and the columella

Alar retraction is prevented and treated with a lining graft (42 patients, no extrusion or collapse at a year or more), and a wide or asymmetric base is reduced in two sequential steps in 423 primary and secondary patients. For an actual columellar defect after trauma or surgery, a philtral flap with rib reconstruction in 14 patients improved both breathing and appearance scores.

Key papers: Pozzi et al., alar base lining graft · Pozzi et al., sequential alar base resection · Bastaninejad et al., philtral flap.

The cleft nose, where secondary surgery is the plan

A cleft nose is operated on in childhood and again at skeletal maturity, so "revision" here is a stage rather than a failure. A systematic review of 25 studies found primary rhinoplasty at the time of cleft lip repair did not restrict nasal growth in eight of nine studies that looked, and between 43% and 100% of those patients avoided a later revision. At maturity, a septal extension graft with a reverse-U incision moved 194 unilateral and 92 bilateral cleft noses measurably toward matched normal controls, with a 4% complication rate in the bilateral series. A 276-patient classification of nasal sill shape gives the base-view deformity a common language.

Key papers: Zelko et al., primary cleft rhinoplasty reviewed · Saito et al., 194 unilateral cases · Saito et al., 92 bilateral cases · Liu et al., the Tajima technique at five years · Xia et al., nasal sill classification.

The revision that is not surgery

Filler, used deliberately as a structural correction of a postsurgical nose rather than as a cosmetic top-up: 1,122 post-rhinoplasty patients over twenty years, 2.8% complications, all minor and transient, 92% satisfaction. It is the largest secondary series on file by patient count, from a single practice, and it treats contour rather than structure or airway.

Key paper: Valente and Zanella, secondary liquid rhinoplasty in 1,122 patients.

The terms, defined

Every term the papers above use to mean something specific, in plain language.

  • Revision, secondary, tertiary: the second operation on a nose and everything after it. "Secondary" is the surgeon's word, "revision" the patient's; in cleft care a secondary rhinoplasty is a planned stage rather than a failure. [34550928, 37797231]
  • PGS staging: a proposed system that grades a revision by problem, number of grafts required and number of previous operations, with a separate category for the patient's expectations, so two surgeons can describe the same difficulty. [27149684]
  • Tongue-in-groove: fixing the medial crura onto the caudal septum rather than propping them on a floating strut. Lower risk of under-rotation, hanging columella and supratip fullness in the 252-case analysis. [34550928]
  • Hanging columella: the columella hanging below the alar rims on profile, one of the three commonest reasons for revision. [34550928]
  • Supratip deformity (pollybeak): fullness above the tip, from scar or from an under-corrected cartilaginous dorsum. [34550928]
  • Homologous costal cartilage: cadaveric rib, supplied fresh frozen, irradiated or minimally irradiated. It avoids a chest incision; the series on file report infection rates of 2.4% to 2.7%. [35511072, 40674713, 32522045]
  • Warping: the tendency of a carved rib graft to bend after implantation. One cause identified from outside the graft: a hump left in place beneath it. [36656674]
  • Diced cartilage in fascia (DCF): cartilage cut small and wrapped, used to build a dorsum that shows no edges; criticised for losing definition, which is the argument for layered alternatives. [40826294, 37289986]
  • SPLF graft: a sandwich of perichondrium, a rib lamina and rectus fascia placed as one unit on the dorsum; reported in over 300 revision cases by its originator. [40826294, 42012848]
  • Acellular dermal matrix (ADM): processed donor dermis used as a dorsal filler in place of an implant, particularly after silicone removal. [36728206]
  • Stromal vascular fraction (SVF): the cell fraction separated from the patient's own fat, injected to soften and lengthen a scarred, contracted nose. [33620926]
  • Capsular contracture and the contracted nose: the scar capsule around a silicone implant tightening, shortening and hardening the nose; the commonest revision problem in East Asian series. [36728206, 40920505]
  • Saddle nose: collapse of the dorsum from lost septal support, graded here in four types, with the mucosal lining and skin condition deciding what can be rebuilt. [42324394]
  • Biofilm and persister cells: bacteria living in a matrix on tissue, tolerant of antibiotics; found in revision patients' soft tissue with no implant present. [35724255]
  • Skin compromise: impaired blood supply to the nasal skin during or after surgery. 7% of one 384-case series, and 25 of those 27 patients were revisions. [33054380]
  • Lateral wall insufficiency (LWI): graded collapse of the sidewall on inspiration, scored by zone before and after repositioning. [37115534]
  • Tajima reverse-U incision: the standard incision for the secondary cleft nose, most effective in children aged 4 to 13 with mild to moderate deformity at five years. [38967637]
  • Nasal stenting: a splint kept in the nostril after cleft rhinoplasty; associated with less reported trouble breathing afterwards. [36696324]
  • Digital osteotomy: refracturing along a previous osteotomy line with finger pressure rather than an osteotome, to avoid creating dead space in a revision. [36877619]

The papers this rests on

The 38 papers everything above was written from. Every one links to its abstract, its authors and its DOI.

  1. APS
    2026PMID 42324394Summary
  2. APS
    2026PMID 40826294Summary
  3. APS
    2025PMID 39572464Summary
  4. APS
    2025PMID 40456991Summary
  5. PRS
    2023PMID 36409217Summary
  6. PRS
    2021PMID 34550928Summary
  7. PRS
    2018PMID 29135891Summary
  8. FPS
    2017PMID 28571072Summary
  9. FPS
    2016PMID 26862968Summary
  10. FPS
    2016PMID 26862969Summary
  11. JAMA FPS
    2016PMID 27149684Summary
  12. ASJ
    2026PMID 41672725Summary
  13. ASJ
    2026PMID 41124352Summary
  14. APS
    2026PMID 41731229Summary
  15. PRS
    2026PMID 40674713Summary
  16. PRS
    2022PMID 35511072Summary
  17. FPSAM
    2021PMID 32522045Summary
  18. PRS
    2026PMID 40920505Summary
  19. FPSAM
    2024PMID 37115534Summary
  20. PRS
    Refining the SPLF Graft: Innovations in Revision Rhinoplasty
    Robotti E, De Bernardis R, Clauss A et al.
    2026PMID 42012848Summary
  21. PRS
    2023PMID 36728206Summary
  22. ASJ
    2023PMID 37289986Summary
  23. ASJ
    2023PMID 36656674Summary
  24. PRS
    2021PMID 33620926Summary
  25. PRS
    2023PMID 36729933Summary
  26. PRS
    2024PMID 38346139Summary
  27. PRS
    2026PMID 42554673Summary
  28. PRS
    2024PMID 36877619Summary
  29. FPSAM
    2025PMID 40139802Summary
  30. ASJ
    2021PMID 32856710Summary
  31. FPSAM
    2021PMID 33337943Summary
  32. FPSAM
    2021PMID 33054380Summary
  33. FPSAM
    2022PMID 35724255Summary
  34. ASJ
    2021PMID 33738466Summary
  35. PRS
    2024PMID 37797231Summary
  36. ASJ
    2024PMID 38314894Summary
  37. PRS
    2025PMID 38967637Summary
  38. PRS
    2023PMID 36696324Summary

What is still contested

  • The revision rate itself. Reviews quote 5% to 15%, one open-rhinoplasty series measured 10.8%, and a single practice's figure depends entirely on who is counted, including the patients who go somewhere else. [27149684, 34550928]
  • Homologous rib against autologous rib is settled by nobody. The homologous series report 2.4% to 3.6% complications with no control arm; the case for autologous rests on it being the patient's own tissue. [35511072, 40674713, 32522045]
  • The layered dorsal constructions and the tissue-based rescues (acellular matrix, stromal vascular fraction) are all single-surgeon series at Level IV or V. Direction is consistent; none has been compared against anything. [40826294, 42012848, 36728206, 33620926]
  • Nothing on file tests when a revision should be done. The convention is to wait about a year; no paper here measures the outcome of waiting against operating earlier.
  • The predictors of returning (a self-esteem item, a psychiatric diagnosis, an expectation gap) are correlations in retrospective cohorts, not a validated rule for declining an operation. [32856710, 40139802, 33337943]
  • Biofilm was found in three of fourteen revision samples. Whether it explains the higher infection rate in revision surgery, or is incidental, is untested. [35724255]
  • Nearly every series here is one surgeon's own patients. The direction repeats across practices and countries; the percentages belong to the practices that published them.

Written by rhinoplasty.cc from the PubMed abstracts, 2026-09-09. Not medical advice.

Related topics

Every paper, by year

181 papers. The 38 above are not repeated.

202627 papers · 9 above
  1. APS
    Current Predictors of Revision at Time of Primary Rhinoplasty
    Garbaccio NC, Smith JE, Schonebaum DI et al.
    PMID 41286173Summary
  2. APS
    PMID 41361149Summary
  3. APS
    PMID 41530561Summary
  4. APS
    Revision Rhinoplasty in Retrocolumellar Perforation
    Göde S, Aliyeva A, Apaydın MB et al.
    PMID 42082664Summary
  5. APS
    PMID 42298163Summary
  6. FPS
    PMID 42580758Summary
  7. FPS
    PMID 41412191Summary
  8. FPS
    PMID 40897332Summary
  9. FPSAM
    PMID 41934318
  10. FPSAM
    Rhinoplasty Revisions: Aesthetic Surgery as a Risk Factor
    Majeethia H, Gorelik D, Mehdi Z et al.
    PMID 41630385
  11. FPS Clin
    PMID 42091328Summary
  12. FPS Clin
    PMID 42091324Summary
  13. FPS Clin
    PMID 42091334Summary
  14. FPS Clin
    PMID 42091333Summary
  15. FPS Clin
    PMID 42091330Summary
  16. FPS Clin
    PMID 42091325Summary
  17. FPS Clin
    PMID 42091321Summary
  18. PRS-GO
    PMID 42028104Summary
202512 papers · 4 above
  1. APS
    PMID 38987315Summary
  2. APS
    PMID 40456990Summary
  3. APS
    PMID 39433615Summary
  4. FPS
    PMID 40425156Summary
  5. PRS-GO
    PMID 40765688Full text
  6. PRS-GO
    PMID 40212098Summary
  7. PRS-GO
    PMID 41050978Summary
  8. PRS-GO
    PMID 40642259Summary
202413 papers · 5 above
  1. APS
    PMID 38839614Summary
  2. APS
    PMID 38148360Summary
  3. APS
    PMID 38379010Summary
  4. APS
    PMID 37626136Summary
  5. APS
    PMID 38693403Summary
  6. FPS Clin
    Secondary Cleft Rhinoplasty
    Liao D, Pereira N, Obayemi A Jr et al.
    PMID 37981415Summary
  7. PRS-GO
    PMID 39247573Summary
  8. PRS-GO
    PMID 39444535Summary
202313 papers · 6 above
  1. ASJ
    PMID 36793242
  2. APS
    PMID 35606536Summary
  3. APS
    PMID 35794245
  4. APS
    PMID 36510019
  5. APS
    PMID 36038664Summary
  6. CPS
    PMID 36396253Summary
  7. FPS
    PMID 36100245Summary
202216 papers · 2 above
  1. APS
    PMID 35577970Summary
  2. APS
    PMID 35817877Full text
  3. APS
    PMID 34981155
  4. APS
    PMID 34585263Summary
  5. CPS
    PMID 34782128Summary
  6. FPS
    PMID 34544174Summary
  7. FPSAM
    PMID 35724257
  8. PRS
    PMID 36067469
  9. PRS
    PMID 36067480
  10. PRS
    PMID 34936638
  11. PRS
    PMID 36166381
  12. PRS
    PMID 34855703
  13. PRS-GO
    PMID 36148029Summary
  14. PRS-GO
    PMID 36381488Summary
202117 papers · 7 above
  1. ASJ
    PMID 33829246
  2. ASJ
    PMID 33231626
  3. APS
    PMID 33432390Summary
  4. APS
    PMID 33403421
  5. APS
    PMID 32997238Summary
  6. PRS
    PMID 34270514Summary
  7. PRS
    PMID 34550929
  8. PRS
    PMID 33764912
  9. PRS
    Secondary Rhinoplasty for Unilateral Cleft Nasal Deformity
    Rohrich RJ, Benkler M, Avashia YJ et al.
    PMID 34076624Summary
  10. PRS-GO
    PMID 34522571Summary
20207 papers
  1. APS
    PMID 32936331
  2. FPS
    PMID 32191956Summary
  3. FPSAM
    PMID 32380871Summary
  4. PRS
    PMID 32459773Summary
  5. PRS
    PMID 32097325Summary
  6. PRS
    PMID 32459772Summary
  7. PRS-GO
    PMID 32766052Summary
20195 papers
  1. ASJ
    PMID 30517591Summary
  2. APS
    PMID 31139910Summary
  3. FPS
    PMID 30759459Summary
  4. PRS
    Role of Fresh Frozen Cartilage in Revision Rhinoplasty
    Mohan R, Shanmuga Krishnan RR, Rohrich RJ
    PMID 31461014Summary
  5. PRS-GO
    Unique Uses of SPY: Revision Rhinoplasty
    Amirlak B, Dehdashtian A, Sanneic K et al.
    PMID 31624661Summary
201812 papers · 1 above
  1. ASJ
    PMID 29788068
  2. ASJ
    PMID 29394321Summary
  3. FPS
    PMID 29857333Summary
  4. FPS
    PMID 29857337Summary
  5. FPS
    PMID 29857339Summary
  6. FPS Clin
    Grafting Techniques in Primary and Revision Rhinoplasty
    Wong BJF, Friedman O, Hamilton GS 3rd
    PMID 29636151Summary
  7. JAMA FPS
    PMID 29710239
  8. JAMA FPS
    PMID 30326520Summary
  9. PRS
    PMID 30252826
  10. PRS-GO
    PMID 29464170Summary
  11. PRS-GO
    PMID 30349780Summary
20178 papers · 1 above
  1. ASJ
    PMID 29025221
  2. ASJ
    PMID 28472446Summary
  3. APS
    PMID 28341947Summary
  4. FPS
    PMID 28571070Summary
  5. PRS
    PMID 28841603
  6. PRS
    PMID 28574946Summary
  7. PRS
    PMID 29068924Summary
201613 papers · 3 above
  1. CPS
    PMID 26616707Summary
  2. CPS
    Revision Rhinoplasty
    Loyo M, Wang TD
    PMID 26616705Summary
  3. FPS
    PMID 27494585Summary
  4. FPS
    PMID 27494586Summary
  5. FPS
    PMID 28033636Summary
  6. FPS Clin
    Controversies in Revision Rhinoplasty
    Rosenberger ES, Toriumi DM
    PMID 27400847Summary
  7. PRS
    Digital Imaging in Secondary Rhinoplasty
    Lehrman CR, Lee MR, Ramanadham S et al.
    PMID 27219263Summary
  8. PRS
    PMID 26818276Summary
  9. PRS-GO
    PMID 27536492Summary
  10. PRS-GO
    PMID 27482502Summary
20153 papers
  1. ASJ
    PMID 25653241Summary
  2. JAMA FPS
    PMID 25719757Summary
  3. JAMA FPS
    PMID 26111006Summary
201412 papers
  1. ASJ
    PMID 25158684Summary
  2. FPS
    PMID 25076457Summary
  3. FPS Clin
    PMID 24290995Summary
  4. JAMA FPS
    PMID 24201895Summary
  5. JAMA FPS
    PMID 24458140Summary
  6. PRS
    PMID 24374691
  7. PRS
    PMID 24776545Summary
  8. PRS
    PMID 24374692
  9. PRS
    PMID 24776586
  10. PRS
    PMID 25415095Summary
  11. PRS
    PMID 24776585
  12. PRS-GO
    PMID 25289365Summary
201311 papers
  1. ASJ
    Cosmetic rhinoplasty: revision rates revisited
    Neaman KC, Boettcher AK, Do VH et al.
    PMID 23277618Summary
  2. ASJ
    PMID 23855009Summary
  3. ASJ
    PMID 23395883Summary
  4. PRS
    PMID 24076669
  5. PRS
    PMID 23358003
  6. PRS
    PMID 23783064Summary
  7. PRS
    PMID 24281624
  8. PRS
    PMID 23249985Summary
  9. PRS
    PMID 23714816
  10. PRS
    Secondary rhinoplasty: patients' expectations and operative goals
    Persichetti P, Gigliofiorito P, Del Buono R et al.
    PMID 23714815
  11. PRS
    PMID 23676971Summary
201210 papers
  1. FPS
    PMID 22872555Summary
  2. FPS
    PMID 22872554Summary
  3. FPS
    PMID 22872560Summary
  4. FPS
    PMID 22872552Summary
  5. FPS
    PMID 22872553Summary
  6. FPS
    PMID 22872551
  7. FPS
    PMID 22872558Summary
  8. PRS
    PMID 22929252
  9. PRS
    PMID 22373979Summary
  10. PRS
    PMID 22575851Summary
20112 papers
  1. ASJ
    PMID 21908809Summary
  2. FPS
    PMID 22028013Summary