1. Attending Orthopedic Surgeon, Edward Hospital, Naperville, Illinois.
2. Associate Professor of Orthopedic Surgery, Northwestern University Medical School, Northwestern Memorial Hospital, Chicago, Illinois.
3. Assistant Professor of Orthopedic Surgery, University of California, San Diego Medical Center, San Diego, California.
4. Orthopedic Surgery Resident, Georgetown University Medical Center, Washington, DC.
5. Professor of Orthopedic Surgery, Northwestern University Medical School, Children's Memorial Hospital, Chicago, Illinois.