1 Department of Oral Medicine, University of Pennsylvania School of Dental Medicine, Philadelphia, PA, United States; Department of Oral and Maxillofacial Surgery, University of Pennsylvania Health System, Philadelphia, PA, United States. Electronic address: ets@dental.upenn.edu.
2 Department of Pathology, University of Pennsylvania School of Dental Medicine, United States; Perelman School of Medicine, University of Pennsylvania, United States.
3 Department of Oral and Maxillofacial Surgery, University of Pennsylvania Health System, Philadelphia, PA, United States; Department of Oral & Maxillofacial Surgery/Pharmacology, University of Pennsylvania School of Dental Medicine, United States.