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Sarker SK, Rehman S, Ladwa M, Chang A, Vincent C.Sarker SK, et al. Among authors: chang a.Surg Endosc. 2009 Jan;23(1):197-203. doi: 10.1007/s00464-008-9774-6. Epub 2008 Mar 5.Surg Endosc. 2009.PMID: 18320280Clinical Trial.
Moorthy K, Munz Y, Dosis A, Bello F, Chang A, Darzi A.Moorthy K, et al. Among authors: chang a.Surg Endosc. 2004 Nov;18(11):1608-12. doi: 10.1007/s00464-003-9312-5. Epub 2004 Oct 11.Surg Endosc. 2004.PMID: 15931486