[1] St Lukes Int Hosp, Dept Orthoped Surg, Tokyo 1048560, Japan
[2] St Lukes Int Hosp, Dept Radiol, Tokyo 1048560, Japan
[3] UCL, Div Surg & Intervent Sci, London, England
[4] Univ Tokyo, Div Clin Biotechnol, Tokyo, Japan
[5] Univ Tennessee, Dept Orthopaed Surg, Div Sports Med, Campbell Clin, Memphis, TN USA