1. Division of Oral and Maxillofacial Surgery; Department of Oral Medicine and Surgery; Tohoku University Graduate School of Dentistry; Sendai Japan
2. Division of Oral Pathology; Department of Oral Medicine and Surgery; Tohoku Universtiy Graduate School of Dentistry; Sendai Japan
3. Department of Dentistry and Oral Maxillofacial Surgery; Yamagata Prefectural Central Hospital; Yamagata Japan
4. Department of Disaster Obstetrics and Gynecology; Disaster Medical Science Division; International Research Institute of Disaster Science; Tohoku University; Sendai Japan