Affiliation: | 1.Center for Endemic Disease Control, Chinese Center for Disease Control and Prevention, Harbin Medical University, Harbin, China ;2.Harbin Center for Disease Control and Prevention, Harbin, China ;3.Institute for Endemic Disease Prevention and Treatment of Shanxi Province, Linfen, Shanxi, China ;4.Department of Epidemiology, School of Public Health, Dalian Medical University, Dalian, China ;5.Key Laboratory of Etiology and Epidemiology, National Health and Family Planning Commission, Center for Endemic Disease Control, Chinese Center for Disease Control and Prevention, Harbin Medical University, Harbin, China ; |