H Satonaka1, M Tsujii2, A Sudo1. 1. Department of Orthopaedic Surgery, Mie University Graduate School of Medicine, Tsu, Mie, Japan. 2. Department of Orthopaedic Surgery, Mie University Graduate School of Medicine, Tsu, Mie, Japan m-t727@clin.medic.mie-u.ac.jp.