1. Department of Orthopaedic Surgery, Gifu University School of Medicine, 1-1 Yanagido, Gifu City 501-1194, Japan
2. Department of Pharmacology and Therapeutics, University of South Florida, 4202 E. Fowler Avenue, Tampa, FL 33620, U.S.A.
3. Shriners Hospital for Children, University of South Florida, 12502 Pine Drive, Tampa, FL 33612, U.S.A.
4. Department of Orthopaedic Surgery, Nagahama Municipal Hospital, 313 Ohinuicho, Nagahama 526-8580, Japan