1 Duke Craniomaxillofacial Trauma Program, Duke Craniomaxillofacial Trauma and Reconstructive Surgery, Division of Plastic, Maxillofacial and Oral Surgery, Duke University Medical Center, DUMC Box 2955, Durham, NC 27710, USA. Electronic address: David.Powers@duke.edu.
2 Academic Department of Military Surgery and Trauma, Royal Centre for Defence Medicine, Queen Elizabeth Medical Centre, Mindelsohn Way, Edgbaston, Birmingham B15 2WB, UK; Formerly, Division of Plastic, Maxillofacial and Oral Surgery, Duke University Medical Center, Durham, NC, USA.