1. Department of Medical Epidemiology and Biostatistics Karolinska Institutet Stockholm Sweden
2. Department of Epidemiology and Health Statistics and Key Laboratory of Ministry of Education for Gastrointestinal Cancer Fujian Medical University Fuzhou China
3. Department of Epidemiology and Biostatistics University of California San Francisco California USA
4. Department of Radiation Oncology The First Affiliated Hospital of Guangxi Medical University Nanning China
5. Key Laboratory of High‐Incidence‐Tumor Prevention & Treatment (Guangxi Medical University) Ministry of Education Nanning China
6. Guangxi Health Commission Key Laboratory of Molecular Epidemiology of Nasopharyngeal Carcinoma Wuzhou Red Cross Hospital Wuzhou China
7. State Key Laboratory of Oncology in South China Collaborative Innovation Center for Cancer Medicine, Guangdong Key Laboratory of Nasopharyngeal Carcinoma Diagnosis and Therapy, Sun Yat‐sen University Cancer Center Guangzhou China
8. Department of Otolaryngology‐Head & Neck Surgery First Affiliated Hospital of Guangxi Medical University Nanning China
9. Medical affair Office Sun Yat‐sen University Cancer Center Guangzhou China
10. Clinical Effectiveness Research Group, Institute of Health and Society University of Oslo Oslo Norway