1. Oral and Maxillofacial Surgery, Clinical Sciences; Graduate School of Comprehensive Human Sciences; University of Tsukuba; Tsukuba Ibaraki Japan
2. Department of Oral and Maxillofacial Surgery; Faculty of Medicine; University of Tsukuba; Tsukuba Ibaraki Japan
3. Cardiovascular Division; Faculty of Medicine; University of Tsukuba; Tsukuba Ibaraki Japan