1. State Key Laboratory of Infectious Disease Prevention and Control, National Institute for Communicable Disease Control and Prevention, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Chinese Center for Disease Control and Prevention 102206 Changping Beijing China
2. Shanghai Institute for Emerging and Re-emerging infectious diseases, Shanghai Public Health Clinical Center 201508 Shanghai China
3. Yushu Prefecture Center for Disease Control and Prevention 815000 Yushu Qinghai province China