1. Associate Research Scientist, African Population and Health Research Center, Nairobi, Kenya
2. Research Officer, African Population and Health Research Center, Nairobi, Kenya
3. Research Assistant, Heilbrunn Department of Population and Family Health, Mailman School of Public Health, Columbia University, New York, NY, USA
4. Senior Program Officer, Heilbrunn Department of Population and Family Health, Mailman School of Public Health, Columbia University, New York, NY, USA
5. Chair, Heilbrunn Department of Population and Family Health, Mailman School of Public Health, Columbia University, New York, NY, USA
6. Assistant Professor, Heilbrunn Department of Population and Family Health, Mailman School of Public Health, Columbia University, New York, NY, USA.