1. Chinese Center for Disease Control and Prevention, Beijing, China
2. United States Centers for Disease Control and Prevention, Atlanta, Georgia, USA
3. United States Centers for Disease Control and Prevention, Atlanta, Georgia, USA; China–US Collaborative Program on Emerging and Re-Emerging Infectious Diseases, Beijing, China
4. Inner Mongolia Center for Tuberculosis Control and Prevention, Hohhot, China
5. Ulanqab Center for Tuberculosis Control and Prevention, Ulanqab, China