1. Departments of Surgery and Pediatric Surgery, Massachusetts General Hospital, Boston, Massachusetts.
2. Department of Oral and Maxillofacial Surgery, School of Stomatology, Fourth Military Medical University, Shaanxi, P.R. China.
3. Harvard Medical School, Boston, Massachusetts.
4. Kensey Nash Corporation, Exton, Pennsylvania.
5. Plastic Surgery Research Laboratories, Massachusetts General Hospital, Boston, Massachusetts.