1. Department of Otolaryngology-Head and Neck Surgery; Wayne State University and Karmanos Cancer Institute; Detroit Michigan
2. Keck School of Medicine; University of Southern California; Los Angeles California U.S.A
3. Department of Otolaryngology-Head and Neck Surgery; Hotel Dieu de France Hospital, Saint Joseph University; Beirut Lebanon
4. Department of Surgery; John D. Dingell VA Medical Center; Detroit Michigan