1 National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention, Shanghai, China; School of Global Health, Chinese Center for Tropical Diseases Research-Shanghai Jiao Tong University School of Medicine, Shanghai, China.
2 National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention, Shanghai, China; School of Global Health, Chinese Center for Tropical Diseases Research-Shanghai Jiao Tong University School of Medicine, Shanghai, China. Electronic address: zhouxn1@chinacdc.cn.