1 National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention; Chinese Center for Tropical Diseases Research; WHO Collaborating Centre for Tropical Diseases; National Center for International Research on Tropical Diseases, Ministry of Science and Technology; Key Laboratory of Parasite and Vector Biology, Ministry of Health, Shanghai, China.
2 Sichuan Center for Disease Control and Prevention, Chengdu, Sichuan, China.
3 Center for Disease Control and prevention of Ganzi Tibetan Autonomous Prefecture, Ganzi, Sichuan, China.
4 Shiqu County Center for Disease Control and Prevention, Ganzi, Sichuan, China.