1 Center for Endemic Disease Control; Chinese Center for Disease Control and Prevention; Harbin Medical University, Harbin 150081, Heilongjiang, China.
2 Center for Disease Control and Prevention in Xinjiang Uygur Autonomous Region, Urumqi 830002, Xinjiang, China.
3 Center for Disease Control and Prevention in Anhui Province, Hefei 238007, Anhui, China.
4 Institute for Endemic Disease Control and Prevention in Shanxi Province, Linfen 041000, Shanxi, China.
5 Center for Disease Control and Prevention in Liaoning Province, Shenyang 110005, Liaoning, China.
6 Center for Disease Control and Prevention in Sichuan Province, Chengdu 610041, Sichuan, China.
7 Center for Disease Control and Prevention in Fujian Province, Fuzhou 350001, Fujian, China.
8 Center for Disease Control and Prevention in Hubei Province, Wuhan 430079, Hubei, China.
9 Center for Endemic Disease Control; Chinese Center for Disease Control and Prevention; Harbin Medical University, Harbin 150081, Heilongjiang, China;Key lab of Etiology and Epidemiology, Education Bureau of Heilongjiang Province & Ministry of Health, Microelement and human health lab of Heilongjiang Province, Center for Endemic Disease Control, Chinese Center for Disease Control and Prevention, Harbin Medical University, Harbin 150081, Heilongjiang, China.