1. School of Medicine, University of Maryland School of Nursing, Baltimore, MD, USA
2. School of Medicine, University of Louisville, Louisville, KY, USA
3. School of Medicine, Brown University, Providence, RI, USA
4. School of Medicine, Samford University, Homewood, AL, USA
5. School of Medicine, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
6. School of Medicine, Cleveland Clinic, Cleveland, OH, USA
7. School of Medicine, Vanderbilt School of Medicine, Nashville, TN, USA
8. Immunization Action Coalition, Saint Paul, MN, USA