1. Department of General Surgery, Spital Uster, Uster, Switzerland
2. Department of Otolaryngology - Head & Neck Surgery, Joan and Sanford I Weill Medical College of Cornell University, New York, New York
3. Department of Facial Plastic & Reconstructive Surgery, Center for Facial Plastic Surgery, Chappaqua, New York
4. Department of Dermatology, Weill Cornell Medical College, New York, New York
5. Department of Otolaryngology - Head and Neck Surgery, NewYork-Presbyterian Hospital, New York, New York
6. Northeast Dermatology Associates, Dover, New Hampshire
7. Massachusetts General Hospital Cancer Center, Center for Cancer Research, Charlestown, Massachusetts
8. Department of Otolaryngology, Columbia University, New York, New York