1. Xinjiang Uygur Autonomous Region Center for Disease Control and Prevention, Urumqi, China
2. Division of Infectious Disease, Key Laboratory of Surveillance and Early-warning on Infectious Disease, Chinese Center for Disease Control and Prevention, Beijing, China
3. Xinjiang Medical University Library, Urumqi, China
4. School of Public Health, Xinjiang Medical University, Urumqi, China
5. Office of the Director, Chinese Center for Disease Control and Prevention, Beijing, China