1. Department of Plastic and Reconstructive Surgery; Graduate School of Medical Sciences, Tokyo Medical and Dental University; Tokyo Japan
2. Department of Otolaryngology; Graduate School of Medical Sciences, Tokyo Medical and Dental University; Tokyo Japan
3. Department of Neurosurgery; Graduate School of Medical Sciences, Tokyo Medical and Dental University; Tokyo Japan
4. Department of Head and Neck Surgery; Graduate School of Medical Sciences, Tokyo Medical and Dental University; Tokyo Japan