[1] Royal London Hosp, Trauma & Orthopaed Dept, London E1 1BB, England
[2] Princess Alexandra Hosp, Trauma & Orthopaed Dept, Harlow, Essex, England
[3] Univ Coll Hosp, Trauma & Orthopaed Dept, London, England
[4] Univ Coll Hosp, London, England
[5] Univ Coll Hosp, Surg Specialties, London, England
[6] Univ Coll Hosp, Inst Sport Exercise & Hlth, London, England