TI - MAintenance of certification PT - JOUR DP - 2009 TA - Archives of Surgery pages = {617}, VI - 144 IP - 7 AID - 10.1001/archsurg.2009.617 [doi] 4100 - http://dx.doi.org/10.1001/archsurg.2009.617 SO - Archives of Surgery July 20, 2009 144(7):617