1. Department of Fixed Prosthodontics; School of Dental Medicine; Tsurumi University; Yokohama Japan
2. Department of Internal Medicine; Tsurumi University School of Dental Medicine; Yokohama Japan
3. Orofacial Pain/Oral Medicine Center; Division of Diagnostic Sciences; School of Dentistry; University of Southern California; Los Angeles CA USA
4. Division of Endodontics; Oral and Maxillofacial Surgery and Orthodontics; School of Dentistry; University of Southern California; Los Angeles CA USA