1. Department of Orthopaedic Surgery, Children’s Hospital of Philadelphia, 2nd Floor Wood Building, 34th Street & Civic Center Boulevard, Philadelphia, Pennsylvania 19104-4399, USA.
2. Department of Orthopaedic Surgery, Timone Children’s Hospital, 264 St-Pierre Street, 13005 Marseille, France.
3. Department of Orthopaedic Surgery, Children’s Hospital, Harvard Medical School, 300 Longwood Avenue, Boston, Massachussetts 02115, USA.
4. Department of Orthopaedic Surgery, Children’s Hospital San Diego, 3030 Children’s Way, San Diego, California 92123, USA.
5. Department of Orthopaedic Surgery, Carolinas Medical Center, 1000 Blythe Boulevard, Charlotte, North Carolina 28232, USA.
6. Department of Orthopaedic Surgery, Johns Hopkins Hospital, 601 North Carolina Street, Baltimore, Maryland 21287-0882, USA.