1 Department of Health Management, The Third Xiangya Hospital, Central South University, Changsha, China.
2 Department of Cancer Epidemiology and Prevention Research, Cancer Care Alberta, Alberta Health Services, Calgary, AB, Canada.
3 Departments of Oncology and Community Health Sciences, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada.
4 Medical Research & Biometrics Center, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China.
5 Department of Biostatistics, Bioinformatics & Biomathematics, Georgetown University, Washington, DC, United States.
6 Department of Pharmacology, Xiangya School of Pharamceutical Science, Central South University, Changsha, China.
7 Department of Health Management, Aerospace Center Hospital, Beijing, China.
8 Department of Epidemiology, School of Medicine, Hunan Normal University, Changsha, China.