1. Hoshigaoka Koseinenkin Hospital, Department
of Orthopaedic Surgery, 4-8-1 Hoshigaoka, Hirakata-shi, Osaka
573-8511, Japan.
2. Moriguchi Keijinkai Hospital, Department
of Orthopaedic Surgery, 2-47-12, Yakumohigashi, Moriguchi-shi, Osaka
570-0021, Japan.
3. Shijonawate Gakuen University, 6-45
Gakuen-cho, Daito-shi, Osaka
574-0001, Japan.