1. Department of Epidemiology, School of Public Health, University of Washington, Seattle, WA, United States of America
2. Department of Community Medicine, Field Epidemiology Training Program, University of Zimbabwe, Harare, Zimbabwe
3. Department of Health Services, School of Public Health, University of Washington, Seattle, United States of America
4. Ministry of Health and Child Care, National Malaria Control Program, Harare, Zimbabwe
5. Departments of Family and Child Nursing and Global Health, University of Washington, Seattle, WA, United States of America