Xinjiang Institute of Technology, Aksu, China. Sanquan College of Xinxiang Medical University, Xinxiang, China. National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China. School of Laboratory Medicine and Biotechnology, Southern Medical University, China. Department of Nutrition and Food Hygiene School of Public Health, Zhejiang University School of Medicine, Hangzhou, China. School of Public Health, Peking University Health Science Center, Beijing 100021, China. Hangzhou Lin 'an District Center for Disease Control and Prevention, Hangzhou, China.