Affiliation: | 1. Division of Oral Medicine, College of Dentistry, Al‐Mustansiriya University, , Baghdad, Iraq;2. Division of Pharmacoepidemiology, Division of Rheumatology, Brigham and Women's Hospital, , Boston, MA, USA;3. Division of Oral Medicine and Dentistry, Brigham and Women's Hospital, , Boston, MA, USA;4. Department of Oral Medicine, Infection and Immunity, Harvard School of Dental Medicine, , Boston, MA, USA |