1. Department of Plastic Surgery, University of Pittsburgh, Pittsburgh, Pa.
2. Faculty of Medicine Mannheim, Ruprecht Karls University of Heidelberg, Mannheim, Germany
3. Department of Otorhinolaryngology, Head and Neck Surgery, University Medical Centre Mannheim, Mannheim, Germany
4. Faculty of Medicine, Damascus University, Damascus, Syrian Arab Republic
5. Faculty of Medicine, University of Aleppo, Aleppo, Syrian Arab Republic
6. Department of Hand, Plastic and Reconstructive Surgery, Burn Center, BG Trauma Center Ludwigshafen, Plastic- and Hand Surgery, University of Heidelberg, Ludwigshafen, Germany
7. Department of Surgery, University of Arizona, Tucson, Ariz.
8. Department of Neuroradiology, University of Pittsburgh Medical Center, Pittsburgh, Pa.
9. Division of Plastic and Reconstructive Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, Mass.