1. Center for Vaccine Development, Institute for Global Health, University of Maryland School of Medicine, Baltimore, MD, USA
2. GSK, Philadelphia, PA, USA
3. School of Medicine, Medical Sciences Campus, University of Puerto Rico, San Juan PR, Puerto Rico
4. Joan C. Edwards School of Medicine, Marshall University, Huntington, WV, USA
5. Children's Mercy Hospital and Clinics, and University of Missouri at Kansas City, Kansas City, MO, USA
6. Palmetto Pediatrics PA, North Charleston, SC, USA
7. Dixie Pediatrics, Saint George, UT, USA
8. Pediatric Associates of Mount Carmel, Inc., Cincinnati, OH, USA
9. Oklahoma State University, Center for Health Sciences, Tulsa, OK, USA
10. Full Health University Medical Clinic, Santa Ana, CA, USA
11. Pediatric Medical Associates, Norriton, PA, USA
12. GSK, Wavre, Belgium
13. GSK, King of Prussia, PA, USA