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1 Department of Oral Medicine, University of Pennsylvania School of Dental Medicine, Philadelphia. Electronic address: ets@upenn.edu.
2 Department of Oral and Maxillofacial Surgery and Pharmacology, University of Pennsylvania School of Dental Medicine, Philadelphia; Department of Otorhinolaryngology: Head and Neck Surgery, Perelman School of Medicine, University of Pennsylvania, Philadelphia.
1 Department of Oral Medicine, University of Pennsylvania School of Dental Medicine, Philadelphia. Electronic address: ets@upenn.edu.
2 Department of Oral and Maxillofacial Surgery and Pharmacology, University of Pennsylvania School of Dental Medicine, Philadelphia; Department of Otorhinolaryngology: Head and Neck Surgery, Perelman School of Medicine, University of Pennsylvania, Philadelphia.