1. Department of Otolaryngology Head and Neck Surgery Beijing Tongren Hospital, Capital Medical University; Key Laboratory of Otolaryngology Head and Neck Surgery of the Ministry of Education Beijing China
2. Department of Head and Neck Surgery The University of Texas MD Anderson Cancer Center Houston Texas USA
3. Department of Otolaryngology The First Affiliated Hospital of Soochow University Suzhou China
4. Department of Biostatistics The University of Texas MD Anderson Cancer Center Houston Texas USA
5. Section of Epidemiology and Population Sciences Baylor College of Medicine Houston Texas USA
6. Division of Epidemiology The University of Texas School of Public Health Houston Texas USA