* Professor of Pediatrics and Orthopaedic Surgery, University of Cincinnati College of Medicine; Director of Pediatric Orthopaedics, Children's Hospital Medical Center, Cincinnati, Ohio 45229.
** Senior Resident in Orthopaedic Surgery, University of Cincinnati College of Medicine, 231 Bethesda Avenue, Cincinnati, Ohio 45267.
Reprint requests to Alvin H. Crawford, M.D.
Appeared as a scientific exhibit at the Annual Meeting of the American Academy of Orthopaedic Surgeons held in Atlanta, Georgia, February 7–12, 1980.
Received: June 27, 1980.