1. From the Craniofacial Pain and Headache Center, Tufts University School of Dental Medicine, Tufts Medical Center (S.J.S.); the Department of Oral and Maxillofacial Surgery, Massachusetts General Hospital, and the Harvard School of Dental Medicine (D.A.K., L.B.K.); and Harvard Vanguard Medical Associates (D.A.K.) — all in Boston.