1. Veterans Affairs, James A Haley Veterans Hospital; Tampa Florida
2. Department of Radiation Oncology; Memorial Sloan Kettering Cancer Center; New York New York U.S.A
3. Department of Biostatistics; Memorial Sloan Kettering Cancer Center; New York New York U.S.A
4. Department of Medical Oncology; Memorial Sloan Kettering Cancer Center; New York New York U.S.A
5. Department of Surgical Oncology ENT; Memorial Sloan Kettering Cancer Center; New York New York U.S.A