1. Children’s Hospital of Philadelphia, University of Pennsylvania, Philadelphia, Pennsylvania;
2. Department of Paediatric and Adolescent Health, Faculty of Medicine, University of Botswana, Gaborone, Botswana;
3. Department of Pediatrics, Texas Children’s Hospital and Baylor College of Medicine, Houston, Texas;
4. British Columbia Children’s Hospital and University of British Columbia, Vancouver, British Columbia, Canada;
5. Department of Pediatrics, University of Minnesota, Minneapolis, Minnesota;
6. Department of Pediatrics, Seattle Children’s Hospital and University of Washington, Seattle, Washington;
7. Department of Pediatrics, Boston Children’s Hospital and Harvard Medical School, Harvard University, Boston, Massachusetts;
8. Department of Paediatrics and Child Health, Makerere University, Kampala, Uganda;
9. Department of Pediatrics, Dogliotti School of Medicine, University of Liberia, Monrovia, Liberia;
10. Department of Pediatrics, Hospital Nacional Pedro Bethancourt, La Antigua, Guatemala; and
11. Department of Pediatrics, School of Medicine and Public Health, University of Wisconsin, Madison, Wisconsin