1. Assistant Professor, Division of Orthopaedic Surgery, University of California, Los Angeles, School of Medicine, Center for the Health Sciences, Room 76-125, 10833 Conte Avenue, Los Angeles, California 90024-6902.
2. Assistant Professor, Department of Orthopaedic Surgery, Wayne State University School of Medicine. To whom requests for reprints should be addressed at: Department of Orthopaedic Surgery, Wayne State University School of Medicine. Hutzel Hospital, 4707 St. Antoine, 1-South, Detroit, Michigan 48201.