Thompson Sarah K, Wong Andrew L, Trevenen Cynthia L, MacGregor John Henry
Department of Surgery, Alberta Children's Hospital, 1820 Richmond Rd. SW, Calgary, Alberta T2T 5C7, Canada.
Am J Surg. 2004 Feb;187(2):316-8. doi: 10.1016/j.amjsurg.2003.04.009.