1. School of Public HealthCollege of Health Sciences, Moi University Eldoret Kenya
2. Academic Model Providing Access to Healthcare (AMPATH) Eldoret Kenya
3. University Health ServicesUniversity of Eldoret Eldoret Kenya
4. School of MedicineCollege of Health Sciences, Moi University Eldoret Kenya
5. School of Environment StudiesUniversity of Eldoret Kenya
6. Section of Environment and RadiationInternational Agency for Research on Cancer Lyon France