1. Division of Molecular and Clinical Epidemiology; Aichi Cancer Center Research Institute; Nagoya Japan
2. Department of Otolaryngology, Head and Neck Surgery; Nagoya City University Graduate School of Medicine; Nagoya Japan
3. Division of Epidemiology and Prevention; Aichi Cancer Center Research Institute; Nagoya Japan
4. Department of Epidemiology; Nagoya City University Graduate School of Medicine; Nagoya Japan
5. Department of Head and Neck Surgery; Aichi Cancer Center Hospital; Nagoya Japan