1. Department of Epidemiology, University of Washington, Seattle, Washington;
2. Department of Global Health, University of Washington, Seattle, Washington;
3. Childhood Acute Illness & Nutrition Network (CHAIN), Nairobi, Kenya;
4. Pharmactuarials LLC, Mountain View, California;
5. Department of Pediatrics, University of Washington, Seattle, Washington;
6. Department of Medicine, University of Washington, Seattle, Washington