1. Division of Infectious Diseases, Department of Medicine, Northwestern University Feinberg School of Medicine , Chicago, IL , USA
2. Section of Infectious Diseases and Global Health, Department of Medicine, University of Chicago , Chicago, IL , USA
3. Management and Development for Health , Dar es Salaam , Tanzania
4. Institute for Public Health and Medicine, Northwestern University Feinberg School of Medicine , Chicago, IL , USA
5. Division of Epidemiologic Research, Department of Research and Evaluation , Kaiser Permanente Southern California, Pasadena, CA , USA
6. Havey Institute for Global Health, Northwestern University Feinberg School of Medicine , Chicago, IL , USA