1. a University of Washington School of Medicine , Seattle , WA , USA
2. b University of Washington School of Public Health , Seattle , WA , USA
3. c University of Washington School of Social Work , Seattle , WA , USA
4. d Department of Global Health , University of Washington , Seattle , WA , USA
5. e Department of Medicine , University of Colorado , Aurora , CO , USA
6. f Department of Epidemiology , University of Washington , Seattle , WA , USA
7. g Centre for Public Health Research , Kenya Medical Research Institute , Nairobi , Kenya
8. h Department of Medicine , University of Washington , Seattle , WA , USA
9. i Department of Obstetrics and Gynaecology , University of Nairobi , Nairobi , Kenya