1. Division of Oral and Maxillofacial Surgery; Department of Oral Medicine, and Surgery; Tohoku University Graduate School of Dentistry; Sendai Miyagi Japan
2. Department of Oral and Maxillofacial Surgery; Salzburg Paracelsus Medical University; Salzburg Austria
3. Department of Maxillofacial Surgery; Nihon University School of Dentistry at Matsudo; Matsudo Chiba Japan