1. Department of Public Health, College of Health and Human Services, Western Kentucky University, Bowling Green, KY 42101, USA
2. Vanderbilt Institute for Global Health, Vanderbilt University School of Medicine, Nashville, TN 37203, USA
3. Department of Medicine, Vanderbilt University School of Medicine, Nashville, TN 37203, USA
4. Chaoyang Center for Disease Control and Prevention, 25 Huaweili, Panjiayuan, Chaoyang District, Beijing 100021, China
5. State Key Laboratory for Infectious Disease Prevention and Control, National Center for AIDS/STD Control and Prevention, Chinese Center for Disease Control and Prevention, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, 155 Changbai Road, Changping District, Beijing 102206, China
6. Department of Pediatrics, Vanderbilt University School of Medicine, Nashville, TN 37203, USA