1. School of Nursing and Health Professions University of San Francisco Orange California USA
2. Department of Epidemiology, Fielding School of Public Health University of California Los Angeles Los Angeles California USA
3. Wesfarmers Centre of Vaccines and Infectious Diseases Telethon Kids Institute Nedlands Western Australia Australia
4. School of Public Health Texas A&M University College Station Texas USA
5. Influenza Division Centers for Disease Control and Prevention Atlanta Georgia USA
6. Abt Associates Atlanta Georgia USA
7. Baylor Scott & White Health Temple Texas USA
8. Texas A&M University College of Medicine College Station Texas USA
9. The Center for Health Research Kaiser Permanente Northwest Portland Oregon USA