1. Private practice, Orthopaedic Associates of Grand Rapids, P.C., Grand Rapids, Michigan.
2. Professor, Department of Orthopaedic Surgery, Vanderbilt University, Nashville, Tennessee.
3. Professor, Department of Orthopaedic Surgery, Wayne State University School of Medicine, Hutzel Hospital, 1-South, 4707 St. Antoine Blvd., Detroit, Michigan 48201.