1. Departments of Pediatrics, Pharmacology & Public Health, Yale School of Medicine, New Haven, CT, USA
2. Department of Child Health, University of Ghana School of Medicine and Dentistry, Accra, Ghana
3. Korle-Bu Teaching Hospital, Accra, Ghana
4. Department of Child Health, School of Medical Sciences, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana
5. Komfo Anokye Teaching Hospital, Kumasi, Ghana
6. Yale Center for Analytical Sciences, Yale School of Public Health, New Haven, CT, USA
7. Yale School of Nursing, West Haven, CT, USA