1. Department of Oral and Maxillofacial Surgery, University of Michigan Medical Center, Ann Arbor, Michigan
2. Section of Plastic and Reconstructive Surgery, University of Michigan Medical Center, Ann Arbor, Michigan
3. Section of Plastic and Reconstructive Surgery, University of Michigan Medical Center, Ann Arbor, Michigan. *This investigation was performed at the Sections of Oral and Maxillofacial and Plastic and Reconstructive Surgery, Department of Surgery Laboratories, University of Michigan Health Science Center, Ann Arbor, Michigan