1. Department of Neurology, China-Japan Union Hospital, Jilin University, Changchun, 130021, P. R. China
2. Institute for Nutrition and Food Safety, Changchun Center for Disease Control and Prevention, Changchun, 130033, P. R. China
3. Department of Nutrition and Food Hygiene, School of Public Health, Jilin University, 1163 Xinmin Avenue, Changchun, 130021, P. R. China
4. Jinan Center for Disease Control and Prevention, 2 Weiliu Road, Huaiyin District, Jinan, Shandong Province, 250021, P. R. China