1. Center for Endemic Disease Control, Chinese Center for Disease Control and Prevention, Harbin Medical University, Harbin, Heilongjiang, China
2. NHC Key Laboratory of Etiology and Epidemiology, Harbin Medical University, Harbin, Heilongjiang, China
3. Xiamen Center for Disease Control and Prevention, Xiamen, Fujian, China
4. Department of Pathology and Key Lab of Endemic and Ethnic Diseases, Ministry of Education, Guizhou Medical University, Guiyang, Guizhou, China