1. WHO WPRO Regional Reference Measles/Rubella Laboratory and Ministry of Health Key Laboratory of Medical Virology; National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention; Beijing China
2. National Center for Immunizations and Respiratory Diseases; Centers for Disease Control and Prevention; Atlanta Georgia
3. Anhui Center for Disease Control and Prevention; Hefei China
4. Shandong Center for Disease Control and Prevention; Jinan China