1. Department of Health Behavior and Health Education, University of Michigan School of Public Health, Ann Arbor, MI, USA;
2. Department of Psychology, DePaul University, Chicago, IL, USA;
3. Department of Health Behavior and Biological Sciences, University of Michigan School of Nursing, Ann Arbor, MI, USA;
4. Department of Psychiatry, University of Nairobi, Nairobi, Kenya;
5. Centre for HIV Prevention and Research, University of Nairobi, Nairobi, Kenya;
6. Department of Psychiatry, Stroger Hospital of Cook County, Chicago, IL, USA;
7. Centre for HIV Prevention and Research, University of Nairobi, Nairobi, Kenya