1. Department of Community Medicine, Osun State University, Osogbo, Osun State, Nigeria,
2. Department of Community Medicine, College of Health Sciences, Ladoke Akintola University of Technology, Ogbomoso, Oyo State, Nigeria,
3. General Outpatient Department, Military Hospital, Benin, Edo State, Nigeria,
4. Oyo State Primary Health Care Board, Oyo State Secretariat, Agodi, Ibadan, Oyo State, Nigeria,
5. Institut Superieur de Santé, Niamey Quartier Bobiel, Yantala, Niamey, Niger Republic,