1. Department of Big Data in Health Science School of Public Health Center of Clinical Big Data and Analytics of The Second Affiliated Hospital Zhejiang University School of Medicine Hangzhou Zhejiang 310058 P. R. China
2. Department of Epidemiology The University of Texas MD Anderson Cancer Center Houston TX 77054 USA
3. The Key Laboratory of Intelligent Preventive Medicine of Zhejiang Province Hangzhou Zhejiang 310058 P.R. China
4. Department of Liver Surgery & Liver Transplantation West China Hospital Sichuan University Chengdu Sichuan 610041 P. R. China
5. Department of Family Medicine and Population Health Virginia Commonwealth University Richmond VA 23284 USA
6. Cancer Center Zhejiang University Hangzhou Zhejiang 310058 P.R. China