1 Division of Infectious Diseases and Medical Practice Evaluation Center, Massachusetts General Hospital, Harvard University Center for AIDS Research, and Harvard Medical School, Boston, Massachusetts.
2 Ministry of Health and Child Care in Zimbabwe, Harare, Zimbabwe.
3 Division of Infectious Diseases, Brigham and Women's Hospital, Department of Immunology and Infectious Disease, Harvard T.H. Chan School of Public Health, and Botswana Harvard AIDS Institute Partnership, Boston, Massachusetts.