1. Department of Orthopaedic Surgery, Kurume University Medical Center, Fukuoka, Japan.
2. Departments of Dermatology and Orthopaedic Surgery, Kurume University School of Medicine, Fukuoka, Japan.
3. Kurume University Institute of Cutaneous Cell Biology, Kurume, Fukuoka, Japan
4. Department of Dermatology, Osaka City University Graduate School of Medicine, Osaka, Japan.