1 Division of Oral and Maxillofacial Surgery, UT Southwestern Medical Center, University of Texas Southwestern, Parkland Memorial Hospital, 5323 Harry Hines Boulevard, Dallas, TX 75390-9109, USA.
2 Division of Oral and Maxillofacial Surgery, UT Southwestern Medical Center, University of Texas Southwestern, Parkland Memorial Hospital, 5323 Harry Hines Boulevard, Dallas, TX 75390-9109, USA. Electronic address: michael.zide@UTSouthwestern.edu.