1. Centers for Disease Control and Prevention, Atlanta, Georgia
2. Edward Hines Jr Veterans Administration Hospital, Hines
3. Loyola University Medical Center, Maywood, Illinois
4. St Luke’s Hospital, Duluth, Minnesota
5. Johns Hopkins University School of Medicine, Baltimore, Maryland
6. Children’s Hospital of Philadelphia, Pennsylvania
7. Washington University School of Medicine, St Louis, Missouri
8. University of Houston College of Pharmacy, Texas
9. Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts
10. McGill University Health Centre, McGill University, Montréal, Québec, Canada
11. Boston Children’s Hospital, Massachusetts
12. Leeds Teaching Hospitals NHS Trust, United Kingdom