Affiliation: | Yu-Dong Qiu,Fang-Gui Xu,Yi-Tao Ding,Department of Hepatobiliary Surgery,Affiliated Drum Tower Hospital,Medical School,Nanjing University,Nanjing 210008,Jiangsu Province,China Jian-Ling Bai,Department of Epidemiology and Biostatistics,School of Public Health,Nanjing Medical University,Nanjing 210029,China |