RT Journal Article SR Electronic T1 Surgical rate variation analysis JF Canadian Journal of Surgery JO CAN J SURG FD Canadian Medical Association SP 429 OP 430 VO 39 IS 5 A1 Gentleman, Jane F. A1 Vayda, Eugene A1 Parsons, Greg F. YR 1996 UL http://canjsurg.ca/content/39/5/429.abstract