1. Department of Orthopaedic Surgery, Nagoya University Graduate School of Medicine, 65 Tsurumai, Showa-ku, 466-8550, Nagoya, Aichi Japan
2. Department of Pediatric Neurology, Aichi Children’s Health and Medical Center, Obu, Aichi Japan
3. Department of Orthopaedic Surgery, Aichi Children’s Health and Medical Center, Obu, Aichi Japan