1. Department of Epidemiology and Biostatistics, Institute of Public HealthKilimanjaro Christian Medical University College Moshi Tanzania
2. Department of Monitoring Evaluation and ResearchJhpiego Tanzania Dar es Salaam Tanzania
3. School of Public Health and Social SciencesMuhimbili University of Health and Allied Sciences Tanzania
4. Department of Obstetrics and GynecologyKilimanjaro Christian Medical Centre Moshi Tanzania
5. Department of Community HealthInstitute of Public Health, Kilimanjaro Christian Medical College Moshi Tanzania