1. Department of Plastic and Reconstructive Surgery and Maxillofacial Surgery, Kurume University School of Medicine, Kurume-shi, Fukuoka, Japan
2. Division of Microscopic and Developmental Anatomy, Department of Anatomy, Kurume University School of Medicine, Kurume-shi, Fukuoka, Japan
3. Department of Neurological Surgery, National Center Hospital of Neurology and Psychiatry, Kodaira-shi, Tokyo, Japan
4. Department of Neurological Surgery, Takagi Hospital, Okawa-shi, Fukuoka, Japan
5. Department of Plastic and Reconstructive Surgery, Takagi Hospital, Okawa-shi, Fukuoka, Japan