TY - JOUR T1 - Proficiency, competency, and mastery: Comment on “technical proficiency in hand-assisted laparoscopic colon and rectal surgery” AU - Oleynikov D Y1 - 2012/04/01 N1 - 10.1001/archsurg.2011.1342 JO - Archives of Surgery SP - 322 EP - 323 VL - 147 IS - 4 N2 - This article1 and many others suggest that the number of cases needed to achieve mastery in HALS is 105.2- 4 These studies face a number of limitations in their approach including different demographics of the study population, the age of the operating surgeon as well as his or her surgical experience, and the varying difficulty of the operations themselves.5- 6 SN - 0004-0010 M3 - doi: 10.1001/archsurg.2011.1342 UR - http://dx.doi.org/10.1001/archsurg.2011.1342 ER -