1. Masonic
Cancer Center, University of Minnesota, 2231 Sixth Street SE, Minneapolis 55455, United States
2. Department
of Head and Neck Oncosurgery, Tata Memorial Hospital, Mumbai 400012, India
3. Tobacco
Control Research Branch, National Cancer Institute, Bethesda, Maryland 20892, United States
4. Department
of Otolaryngology, Head and Neck Surgery, University of Minnesota, 420 Delaware Street SE, Minneapolis 55455, United States
5. Division
of Environmental Health Sciences, University of Minnesota, 2231 Sixth
Street SE, Minneapolis 55455, United States