1 Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou 310051, Zhejiang, China.
2 Heping District's Center for Disease Control and Prevention, Tianjin 300020, Tianjin, China; Department of Clinical Nutrition, Hangzhou Sanatorium of People's Liberation, Hangzhou 310013, Zhejiang, China.
3 National Institute for Nutrition and Health, Chinese Center for Disease Control and Prevention, Beijing 100050, China.