1. Department of Stomatology and Oral Surgery, Gunma University Graduate School of Medicine, Gunma, Japan
2. Plastic and Reconstructive Surgery, Ohshiro Clinic
3. Tanada Dental Clinic
4. Department of Oral Sciences and Maxillofacial Surgery, Sapienza University of Rome
5. Department of Plastic Surgery, Kobe University Graduate School of Medicine
6. Department of Periodontology, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University