1. From the New England Medical Center, Tufts University, Boston Massachusetts; the
2. Human Reproductive Research Unit, Department of Obstetrics and Gynaecology, Makerere University, Kampala, Uganda; the
3. Department of Pediatrics, Case Western Reserve University, Cleveland, Ohio; the
4. Department of Paediatrics and Child Health, Makerere University, Kampala, Uganda; and the
5. Harvard School of Public Health, Boston, Massachusetts.