1 Resident in Surgery, Division of Pediatric Surgery, Department of Surgery, University of Illinois, Chicago, IL USA.
2 Ex-resident in Surgery, Division of Pediatric Surgery, Department of Surgery, University of Illinois, Chicago, IL USA.
3 Professor Emeritus of Surgery & Urology, Division of Pediatric Surgery, Department of Surgery, University of Illinois, 1502 71st Street, Darien, IL 60561 USA.