1. School of Public Health, Sun Yat-sen University, Guangzhou, Guangdong, PR China
2. School of Health Services Management, Southern Medical University, Guangzhou, PR China
3. Institute for Health Metrics and Evaluation, University of Washington, Seattle, Washington, USA
4. Department of Health Metrics Sciences, School of Medicine, University of Washington, Seattle, Washington, USA
5. Department of Radiation Oncology, Nanfang Hospital, Southern Medical University, Guangzhou, PR China