1. Department of Rehabilitation, Faculty of Medicine, Kagawa University Hospital: 1750-1 Ikenobe, Miki-cho, Kita-gun, Kagawa 761-0793, Japan
2. Maternal Perinatal Center, Faculty of Medicine, Kagawa University
3. Department of Physical Therapy, Faculty of Health and Welfare, Tokushima Bunri University
4. Department of Orthopedic Surgery, Faculty of Medicine, Kagawa University
5. Department of Pediatrics, Faculty of Medicine, Kagawa University