Department of Clinical Nutrition, Daping Hospital, Army Medical University (Third Military Medical University), Chongqing 400042, China; Institute of Hepatopancreatobiliary Surgery, Southwest Hospital, Army Medical University (Third Military Medical University), Chongqing 400038, China. Department of Epidemiology, College of Public Health, Zhengzhou University, Zhengzhou 450001, China. Cancer Center of the First Hospital of Jilin University, Changchun 130021, China. Department of Clinical Nutrition, Daping Hospital, Army Medical University (Third Military Medical University), Chongqing 400042, China. Department of Comprehensive Oncology, National Cancer Center or Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China. Department of Clinical Nutrition, The First Hospital of Hebei Medical University, Shijiazhuang 050031, China. Department of Nutrition and Metabolism of Oncology, The First Affiliated Hospital of University of Science and Technology of China (Anhui Provincial Cancer Hospital), Hefei 230031, China. Department of Medical Oncology, Fujian Cancer Hospital, Fujian Medical University Cancer Hospital, Fuzhou 350014, China. Department of Gastrointestinal Surgery and Department of Clinical Nutrition, Beijing Shijitan Hospital, Capital Medical University, Beijing 100038, China; Key Laboratory of Cancer FSMP for State Market Regulation, Beijing 100038, China. Electronic address: shihp@ccmu.edu.cn. Department of Clinical Nutrition, Daping Hospital, Army Medical University (Third Military Medical University), Chongqing 400042, China. Electronic address: hx_xu2015@163.com.