1. Department of Orthopaedic Surgery, School of Medicine, International University of Health and Welfare, Chiba, Japan.
2. Department of Orthopaedic Surgery, International University of Health and Welfare Mita Hospital, Tokyo, Japan.
3. Department of Orthopaedic Surgery, International University of Health and Welfare Narita Hospital, Chiba, Japan.
4. Department of Vascular Surgery, International University of Health and Welfare Mita Hospital, Tokyo, Japan.
5. Department of Orthopaedic Surgery, International University of Health and Welfare Ichikawa Hospital, Chiba, Japan.