Interventions for congenital talipes equinovarus (clubfoot)
- PMID: 25117413
- PMCID: PMC7173730
- DOI: 10.1002/14651858.CD008602.pub3
Interventions for congenital talipes equinovarus (clubfoot)
Update in
-
Interventions for congenital talipes equinovarus (clubfoot).Cochrane Database Syst Rev. 2020 May 15;5(5):CD008602. doi: 10.1002/14651858.CD008602.pub4. Cochrane Database Syst Rev. 2020. PMID: 32412098 Free PMC article.
Abstract
Background: Congenital talipes equinovarus (CTEV), which is also known as clubfoot, is a common congenital orthopaedic condition characterised by an excessively turned in foot (equinovarus) and high medial longitudinal arch (cavus). If left untreated it can result in long-term disability, deformity and pain. Interventions can be conservative (such as splinting or stretching) or surgical. The review was first published in 2012 and we reviewed new searches in 2013 (update published 2014).
Objectives: To evaluate the effectiveness of interventions for CTEV.
Search methods: On 29 April 2013, we searched CENTRAL (2013, Issue 3 in The Cochrane Library), MEDLINE (January 1966 to April 2013), EMBASE (January 1980 to April 2013), CINAHL Plus (January 1937 to April 2013), AMED (1985 to April 2013), and the Physiotherapy Evidence Database (PEDro to April 2013). We also searched for ongoing trials in the WHO International Clinical Trials Registry Platform (2006 to July 2013) and ClinicalTrials.gov (to November 2013). We checked the references of included studies. We searched NHSEED, DARE and HTA for information for inclusion in the Discussion.
Selection criteria: Randomised controlled trials (RCTs) and quasi-RCTs evaluating interventions for CTEV. Participants were people of all ages with CTEV of either one or both feet.
Data collection and analysis: Two authors independently assessed risk of bias in included trials and extracted the data. We contacted authors of included trials for missing information. We collected adverse event information from trials when it was available.
Main results: We identified 14 trials in which there were 607 participants; one of the trials was newly included at this 2014 update. The use of different outcome measures prevented pooling of data for meta-analysis even when interventions and participants were comparable. All trials displayed bias in four or more areas. One trial reported on the primary outcome of function, though raw data were not available to be analysed. We were able to analyse data on foot alignment (Pirani score), a secondary outcome, from three trials. Two of the trials involved participants at initial presentation. One reported that the Ponseti technique significantly improved foot alignment compared to the Kite technique. After 10 weeks of serial casting, the average total Pirani score of the Ponseti group was 1.15 (95% confidence interval (CI) 0.98 to 1.32) lower than that of the Kite group. The second trial found the Ponseti technique to be superior to a traditional technique, with average total Pirani scores of the Ponseti participants 1.50 lower (95% CI 0.72 to 2.28) after serial casting and Achilles tenotomy. A trial in which the type of presentation was not reported found no difference between an accelerated Ponseti or standard Ponseti treatment. At the end of serial casting, the average total Pirani scores in the standard group were 0.31 lower (95% CI -0.40 to 1.02) than the accelerated group. Two trials in initial cases found relapse following Ponseti treatment was more likely to be corrected with further serial casting compared to the Kite groups which more often required major surgery (risk difference 25% and 50%). There is a lack of evidence for different plaster casting products, the addition of botulinum toxin A during the Ponseti technique, different types of major foot surgery, continuous passive motion treatment following major foot surgery, or treatment of relapsed or neglected cases of CTEV. Most trials did not report on adverse events. In trials evaluating serial casting techniques, adverse events included cast slippage (needing replacement), plaster sores (pressure areas) and skin irritation. Adverse events following surgical procedures included infection and the need for skin grafting.
Authors' conclusions: From the limited evidence available, the Ponseti technique produced significantly better short-term foot alignment compared to the Kite technique and compared to a traditional technique. The quality of this evidence was low to very low. An accelerated Ponseti technique may be as effective as a standard technique, according to moderate quality evidence. Relapse following the Kite technique more often led to major surgery compared to relapse following the Ponseti technique. We could draw no conclusions from other included trials because of the limited use of validated outcome measures and lack of available raw data. Future randomised controlled trials should address these issues.
Conflict of interest statement
JB: research activities are funded by grants and donations from the NHMRC (National Health and Medical Research Council of Australia, Fellowship #1007569 and Centre of Research Excellence #1031893), NIH (National Institutes of Neurological Disorders and Stroke and Office of Rare Diseases, #U54NS065712), Muscular Dystrophy Association, CMT Association of Australia, Foot Power International, Australian Podiatry Education and Research Fund and CMT Association (USA).
PG: No known conflicts of interest.
KG has received funding through the Sydney Medical School, University of Sydney to attend the International Clubfoot Congress in 2011.
DL has received research grants from Novartis, Amgen, Celgene and acted on advisory boards for Lilly and Amgen.
VP: none known.
Figures
Update of
-
Interventions for congenital talipes equinovarus (clubfoot).Cochrane Database Syst Rev. 2012 Apr 18;(4):CD008602. doi: 10.1002/14651858.CD008602.pub2. Cochrane Database Syst Rev. 2012. Update in: Cochrane Database Syst Rev. 2014 Aug 12;(8):CD008602. doi: 10.1002/14651858.CD008602.pub3. PMID: 22513960 Updated.
References
References to studies included in this review
Cummings 2009 {published data only}
-
- Cummings RJ. The effectiveness of botulinum A toxin as an adjunct to the treatment of clubfeet by the Ponseti method: a randomized, double blind, placebo controlled study. Journal of Pediatric Orthopaedics 2009;29(6):564‐9. [PUBMED: 19700984] - PubMed
El‐Deeb 2007 {published data only (unpublished sought but not used)}
-
- El‐Deeb KH, Ghoneim AS, El‐Adwar KL, Khalil AA. Is it hazardous or mandatory to release the talocalcaneal interosseous ligament in clubfoot surgery?: a preliminary report. Journal of Pediatric Orthopaedics 2007;27(5):517‐21. [PUBMED: 17585259] - PubMed
Harnett 2011 {published and unpublished data}
Kaewpornsawan 2007 {published data only}
-
- Kaewpornsawan K, Khuntisuk S, Jatunarapit R. Comparison of modified posteromedial release and complete subtalar release in resistant congenital clubfoot: a randomized controlled trial. Journal of the Medical Association of Thailand 2007;90(5):936‐41. [PUBMED: 17596049] - PubMed
Lahoti 2008 {published and unpublished data}
-
- Lahoti O, Bajaj S. Is there a role for lengthening flexor hallucis and flexor digitorum longus tendons in surgery for club foot?: a preliminary report. The Journal of Bone and Joint Surgery. British Volume 2008;90‐B(6):801‐2. [PUBMED: 18539675] - PubMed
Manzone 1999 {published data only}
-
- Manzone P. Clubfoot surgical treatment: preliminary results of a prospective comparative study of two techniques. Journal of Pediatric Orthopaedics Part B 1999;8(4):246‐50. [PUBMED: 10513357] - PubMed
Pittner 2008 {published data only (unpublished sought but not used)}
-
- Pittner DE, Klingele KE, Beebe AC. Treatment of clubfoot with the Ponseti method: a comparison of casting materials. Journal of Pediatric Orthopaedics 2008;28(2):250‐3. [PUBMED: 18388724] - PubMed
Rijal 2010 {published data only (unpublished sought but not used)}
Sanghvi 2009 {published data only (unpublished sought but not used)}
-
- Sanghvi AV, Mittal VK. Conservative management of idiopathic clubfoot: Kite versus Ponseti method. Journal of Orthopaedic Surgery (Hong Kong) 2009;17(1):67‐71. [PUBMED: 19398797] - PubMed
Selmani 2012 {published data only (unpublished sought but not used)}
-
- Selmani E. Is Ponseti's method superior to Kite's for clubfoot treatment he?. European Orthopaedics and Traumatology 2012;3(3):183‐7. [EMBASE: 2013159837]
Siddiqui 2007 {published data only}
-
- Siddiqui MA, Pirwani MA, Bhura S, Soomro YH. Window procedure versus Turco procedure for the treatment of talipes equino varus. Pakistan Journal of Surgery 2007;23(3):212‐6.
Sud 2008 {published data only}
Zeifang 2005 {published data only}
-
- Zeifang F, Carstens C, Schneider S, Thomsen M. Continuous passive motion versus immobilisation in a cast after surgical treatment of idiopathic club foot in infants: a prospective, blinded, randomised clinical study. Journal of Bone and Joint Surgery. British Volume 2005;87‐B(12):1663‐5. [PUBMED: 16326882] - PubMed
Zwick 2009 {published data only (unpublished sought but not used)}
References to studies excluded from this review
Andriesse 2008 {published data only}
-
- Andriesse H, Hägglund G. Comparison of serial casting and stretching technique in children with congenital idiopathic clubfoot. Evaluation of a new system. Acta Orthopaedica 2008;79(1):53‐61. - PubMed
Atar 1993 {published data only}
-
- Atar D, Lehman WB, Grant AD. Complete soft‐tissue clubfoot release with and without internal fixation. Orthopaedic Review 1993;22(9):1015‐6. - PubMed
Aurell 2005 {published data only}
-
- Aurell Y, Andriesse H, Johansson A, Jonsson K. Ultrasound assessment of early clubfoot treatment: a comparison of the Ponseti method and a modified Copenhagen method. Journal of Pediatric Orthopaedics, Part B 2005;14(5):347‐57. - PubMed
Chang 1991 {published data only}
-
- Chang YL, Huang SC, Liu TK. Surgical management of resistant idiopathic congenital clubfoot. Journal of the Formosan Medical Association 1991;90(12):1186‐93. - PubMed
DePuy 1989 {published data only}
-
- DePuy J, Drennan JC. Correction of idiopathic clubfoot: a comparison of results of early versus delayed posteromedial release. Journal of Pediatric Orthopedics 1989;9(1):44‐8. - PubMed
DeRosa 1986 {published data only}
-
- DeRosa GP, Stepro D. Results of posteromedial release for the resistant clubfoot. Journal of Pediatric Orthopedics 1986;6(5):590‐5. - PubMed
Dimeglio 1996 {published data only}
-
- Dimégio A, Bonnet F, Mazeau P, Rosa V. Orthopaedic treatment and passive motion machine: consequences for the surgical treatment of clubfoot. Journal of Pediatric Orthopaedics Part B 1996;5(3):173‐80. - PubMed
Doğan 2002 {published data only}
-
- Doğan A, Bagatur AE, Zorer G. The effect of deep deltoid ligament release on dorsiflexion in congenital clubfoot treated with complete subtalar release. Acta Orthopaedica et Traumatologica Turcica 2002;36(3):248‐55. - PubMed
Farsetti 2009 {published data only}
Faulks 2009 {published data only}
Halanski 2010 {published data only}
-
- Halanski MA, Davison JE, Huang JC, Walker CG, Walsh SJ, Crawford HA. Ponseti method compared with surgical treatment of clubfoot: a prospective comparison. Journal of Bone and Joint Surgery. American Volume 2010;92(2):270‐8. - PubMed
Ippolito 2003 {published data only}
-
- Ippolito E, Farsetti P, Caterini R, Tudisco C. Long‐term comparative results in patients with congenital clubfoot treated with two different protocols. Journal of Bone and Joint Surgery. American Volume 2003;85‐A(7):1286‐94. - PubMed
Janicki 2011 {published data only}
-
- Janicki JA, Wright JG, Weir S, Narayanan UG. A comparison of ankle foot orthoses with foot abduction orthoses to prevent recurrence following correction of idiopathic clubfoot by the Ponseti method. Journal of Bone and Joint Surgery. British Volume 2011;93‐B(5):700‐4. - PubMed
Kesemenli 2003 {published data only}
-
- Kesemenli CC, Kapukaya A, Subaşi M, Necmioglu S, Arslan H, Ozbag D, et al. Anthropometric study of patients treated for clubfoot. Journal of Pediatric Orthopedics 2003;23(4):498‐502. - PubMed
Kuo 2001 {published data only}
-
- Kuo KN, Hennigan SP, Hastings ME. Anterior tibial tendon transfer in residual dynamic clubfoot deformity. Journal of Pediatric Orthopedics 2001;21(1):35‐41. - PubMed
Li 2007 {published data only}
-
- Li L, Zhang L, Wang E. Comparison of long‐term results between muscle‐strength balancing procedure and McKay procedure in treating congenital clubfoot. Chinese Journal of Reparative and Reconstructive Surgery 2007;21(10):1108‐12. - PubMed
Miura 2005 {published data only}
-
- Miura Y, Kamegaya M, Saisu T, Moriya H. Effect of postoperative early ankle motion exercise using hinged ankle‐foot orthoses in clubfoot. Journal of Pediatric Orthopedics 2005;25(4):529‐32. - PubMed
Napiontek 2000 {published data only}
-
- Napiontek M. Muscular strength after extensive operative treatment of congenital talipes equinovarus. Journal of Pediatric Orthopaedics, Part B 2000;9(2):128‐36. - PubMed
Narang 2011 {published data only}
-
- Narang AS, Singh H, Sharma V, Khare S. Comparison of short term results of JESS distractor and one stage posteriomedial release for neglected, resistant and relapsed or recurrent club foot. Journal of Orthopaedics 2011;8(4):e8.
Nilgün 2011 {published data only}
-
- Nilgün B, Suat E, Engin ŞÍ, Fatma U, Yakut Y. Short‐term results of intensive physiotherapy in clubfoot deformity treated with the Ponseti method. Pediatrics International 2011;53(3):381‐5. - PubMed
O'Brien 2004 {published data only}
-
- O'Brien SE, Karol LA, Johnston CE 2nd. Calcaneus gait following treatment for clubfoot: preliminary results of surgical correction. Journal of Pediatric Orthopaedics, Part B 2004;13(1):43‐7. - PubMed
Ponseti 2006 {published data only}
-
- Ponseti IV, Zhivkov M, Davis N, Sinclair M, Dobbs MB, Morcuende JA. Treatment of the complex idiopathic clubfoot. Clinical Orthopaedics and Related Research 2006;451:171‐6. - PubMed
Richards 2008 {published data only}
-
- Richards BS, Faulks S, Rathjen KE, Karol LA, Johnston CB, Jones SA. A comparison of two nonoperative methods of idiopathic clubfoot correction: the Ponseti method and the French functional (physiotherapy) method. Journal of Bone and Joint Surgery. American Volume 2008;90(11):2313‐21. - PubMed
Simons 1985 {published data only}
-
- Simons GW. Complete subtalar release in club feet. Part II ‐ Comparison with less extensive procedures. Journal of Bone and Joint Surgery. American Volume 1985;67(7):1056‐65. - PubMed
Steinman 2009 {published data only}
-
- Steinman S, Richards BS, Faulks S, Kaipus K. A comparison of two nonoperative methods of idiopathic clubfoot correction: the Ponseti method and the French functional (physiotherapy) method. Surgical technique. Journal of Bone and Joint Surgery. American Volume 2009;91(Suppl 2):299‐312. - PubMed
Thompson 1982 {published data only}
-
- Thompson GH, Richardson AB, Westin GW. Surgical management of resistant congenital talipes equinovarus deformities. Journal of Bone and Joint Surgery. American Volume 1982;64(5):562‐65. - PubMed
Tschopp 2002 {published data only}
-
- Tschopp O, Rombouts JJ, Rossillon R. Comparison of posteromedial and subtalar release in surgical treatment of resistant clubfoot. Orthopedics 2002;25(5):527‐9. - PubMed
Uglow 2000 {published data only}
-
- Uglow MG, Clarke NM. The functional outcome of staged surgery for the correction of talipes equinovarus. Journal of Pediatric Orthopedics 2000;20(4):517‐23. - PubMed
Xu 2011 {published data only}
-
- Xu RJ. A modified Ponseti method for the treatment of idiopathic clubfoot: a preliminary report. Journal of Pediatric Orthopedics 2011;31(3):317‐9. - PubMed
References to ongoing studies
NCT01067651 {published data only}
-
- NCT01067651. Comparison of two different cast materials for the treatment of congenital idiopathic clubfoot using the Ponseti method: a prospective randomized controlled trial. http://clinicaltrials.gov/ct2/show/NCT01067651 (accessed 27 November 2013). - PMC - PubMed
Additional references
Alvarez 2005
-
- Alvarez CM, Tredwell SJ, Keenan SP, Beauchamp RD, Choit RL, Sawatzky BJ, et al. Treatment of idiopathic clubfoot utilizing botulinum A toxin: a new method and its short‐term outcomes. Journal of Pediatric Orthopaedics 2005;25(2):229‐35. - PubMed
Bryant 2006
Cooper 1995
-
- Cooper DM, Dietz FR. Treatment of idiopathic clubfoot. A thirty year follow‐up note. Journal of Bone and Joint Surgery. American Volume 1995;77‐A(10):1447‐89. - PubMed
Cusick 1990
-
- Cusick B. Serial casts: their use in the management of spasticity‐induced foot deformity. Tuscon, Arizona: Communication Skill Builders, 1990.
De Gheldere 2008
-
- Gheldere A, Docquier PL. Analytical radiography of clubfoot after tenotomy. Journal of Pediatric Orthopaedics 2008;28(6):691‐4. - PubMed
Dietz 2006
-
- Dietz FR. Treatment of a recurrent clubfoot deformity after initial correction with the Ponseti technique. Instructional Course Lectures 2006; Vol. 55:625‐9. - PubMed
Dietz 2009
Diméglio 1995
-
- Diméglio A, Bensahel H, Souchet P, Mazeau P, Bonnet F. Classification of clubfoot. Journal of Pediatric Orthopaedics. Part B 1995;4(2):129‐36. - PubMed
Dobbs 2000
Dobbs 2006
-
- Dobbs MB, Nunley R, Schoenecker PL. Long‐term follow‐up of patients with clubfeet treated with extensive soft‐tissue release. Journal of Bone and Joint Surgery. American Volume 2006;88(5):986‐96. - PubMed
Dobbs 2009
Farsetti 2006
-
- Farsetti P, Caterini R, Mancini F, Potenza V, Ippolito E. Anterior tibial tendon transfer in relapsing congenital clubfoot: long‐term follow‐up study of two series treated with a different protocol. Journal of Pediatric Orthopaedics 2006;26(1):83‐90. - PubMed
Fridman 2007
-
- Fridman MW, Almeida Fialho HS. The role of radiographic measurements in the evaluation of congenital clubfoot surgical results. Skeletal Radiology 2007;36(2):129‐38. - PubMed
Graf 2010
-
- Graf A, Hassani S, Krzak J, Long J, Caudill A, Flanagan A, et al. Long‐term outcome evaluation in young adults following clubfoot surgical release. Journal of Pediatric Orthopaedics 2010;30(4):379‐85. - PubMed
Haft 2007
-
- Haft GF, Walker CG, Crawford HA. Early clubfoot recurrence after use of the Ponseti method in a New Zealand population. Journal of Bone and Joint Surgery. American Volume 2007;89‐A(3):487‐93. - PubMed
Halanski 2009
Halanski 2010a
Halanski 2010b
Handelsman 1982
-
- Handelsman JE, Badalamente MA. Club foot: a neuromuscular disease. Developmental Medicine and Child Neurology 1982;24(1):3‐12. - PubMed
Hester 2009
-
- Hester TW, Parkinson LC, Robson J, Misra S, Sangha H, Martin JE. A hypothesis and model of reduced fetal movement as a common pathogenetic mechanism in clubfoot. Medical Hypotheses 2009;73(6):986‐8. - PubMed
Higgins 2008
-
- Higgins JPT, Green S (editors). Cochrane Handbook for Systematic Reviews of Interventions. Chichester (UK): John Wiley & Sons, 2008.
Higgins 2008b
-
- Sterne JAC, Egger M, Moher D. Chapter 10: Addressing reporting biases. In: Higgins JPT, Green S editor(s). Cochrane Handbook for Systematic Reviews of Interventions. Chichester (UK): John Wiley & Sons, 2008.
Higgins 2008c
-
- Higgins JPT, Deeks JJ. Chapter 7: Selecting studies and collecting data. In: Higgins JPT, Green S editor(s). Cochrane Handbook for Systematic Reviews of Interventions. Chichester (UK): John Wiley & Sons, 2008.
Higgins 2011
-
- Higgins JPT, Green S (editors). Cochrane Handbook for Systematic Reviews of Interventions Version 5.1.0 [updated March 2011]. The Cochrane Collaboration, 2011. Available from www.cochrane‐handbook.org.
Janicki 2009
-
- Janicki JA, Narayanan UG, Harvey B, Roy A, Ramseier LE, Wright JG. Treatment of neuromuscular and syndrome‐associated (nonidiopathic) clubfeet using the Ponseti method. Journal of Pediatric Orthopaedics 2009;29(4):393‐7. - PubMed
Keret 2002
-
- Keret D, Ezra E, Lokiec F, Hayek S, Segev E, Wientroub S. Efficacy of prenatal ultrasonography in confirmed club foot. Journal of Bone and Joint Surgery. British Volume 2002;84(7):1015‐9. - PubMed
Kite 1972
-
- Kite JH. Non operative treatment of congenital clubfoot. Clinical Orthopaedics and Related Research 1972;84:29‐38. - PubMed
Laaveg 1980
-
- Laaveg SJ, Ponseti IV. Long‐term results of treatment of congenital club foot. Journal of Bone and Joint Surgery. American Volume 1980;62(1):23‐31. - PubMed
Landgraf 1999
-
- Landgraf JM, Abetz L, Ware JE. The Child Health Questionnaire (CHQ): A User's Manual (2nd printing). Boston, MA: HealthAct, 1999.
Lesaffre 2010
Lovell 1979
-
- Lovell WW, Farley D. Treatment of congenital clubfoot. Ona Journal 1979;6(11):453‐6. - PubMed
Lovell 2007
Masrouha 2012
-
- Masrouha KZ, Morcuende JA. Relapse after tibialis anterior tendon transfer in idiopathic clubfoot treated by the Ponseti method. Journal of Pediatric Orthopedics 2012;32(1):81‐4. - PubMed
Morcuende 2004
-
- Morcuende JA, Dolan LA, Dietz FR, Ponseti IV. Radical reduction in the rate of extensive corrective surgery for clubfoot using the Ponseti method. Pediatrics 2004;113(2):376‐80. - PubMed
Nogueira 2009
Perera 2007
Pirani 2001
-
- Pirani S, Zeznik L, Hodges D. Magnetic resonance imaging study of the congenital clubfoot treated with the Ponseti method. Journal of Pediatric Orthopaedics 2001;21(6):719‐26. - PubMed
Pirani 2008
-
- Pirani S, Hodges D, Sekeramayi F. A reliable and valid method of assessing the amount of deformity in the congenital clubfoot deformity. The Journal of Bone and Joint Surgery. British Volume 2008;90‐B(Supp Ⅰ):53.
Ponseti 2005
-
- Ponseti I, Morcuende J, Mosca V, Pirani S, Dietz F, Herzenberg J, et al. Clubfoot: Ponseti Management. 2nd Edition. Global‐HELP Organization, 2005.
Radler 2007
-
- Radler C, Manner HM, Suda R, Burghardt R, Herzenberg JE, Ganger R, et al. Radiographic evaluation of idiopathic clubfeet undergoing Ponseti treatment. Journal of Bone and Joint Surgery. American Volume 2007;89(6):1177‐83. - PubMed
Redmond 2006
-
- Redmond AC, Crosbie J, Ourvrier RA. Development and validation of a novel rating system for scoring standing foot posture: the Foot Posture Index. Clinical Biomechanics 2006;21(1):89‐98. - PubMed
RevMan 2008 [Computer program]
-
- The Nordic Cochrane Centre, The Cochrane Collaboration. Review Manager (RevMan). Version 5.0. Copenhagen: The Nordic Cochrane Centre, The Cochrane Collaboration, 2008.
Richards 2007
-
- Richards BS, Dempsey M. Magnetic resonance imaging of the congenital clubfoot treated with the French functional (physical therapy) method. Journal of Pediatric Orthopaedics 2007;27(2):214‐9. - PubMed
Sud 2007
Vitale 2005
-
- Vitale MG, Choe JC, Vitale MA, Lee FY, Hyman JE, Roye DP Jr. Patient‐based outcomes following clubfoot surgery: a 16‐year follow‐up study. Journal of Pediatric Orthopaedics 2005;25(4):533‐8. - PubMed
Ware 1992
-
- Ware JE Jr, Sherbourne CD. The MOS 36‐item short‐form health survey (SF‐36). Conceptual framework and item selection. Medical Care 1992;30(6):473‐83. - PubMed
Zionts 2010
-
- Zionts LE, Zhao G, Hitchcock K, Maewal J, Ebramzadeh E. Has the rate of extensive surgery to treat idiopathic clubfoot declined in the United States?. Journal of Bone and Joint Surgery. American Volume 2010;92(4):882‐9. - PubMed
References to other published versions of this review
Gray 2010
Publication types
MeSH terms
Substances
LinkOut - more resources
Full Text Sources
Other Literature Sources
Miscellaneous
