1. School of Pharmacy, University of the Western Cape, Cape Town 7530, South Africa
2. Department of Public Health, Center of Excellence in Reproductive Health Innovation (CERHI), College of Medical Sciences, University of Benin, Benin City 300001, Nigeria
3. Department of Medical Biochemistry, School of Basic Medical Sciences, University of Benin, Benin City 300001, Nigeria
4. Department of Epidemiology and Medical Statistics, Faculty of Public Health, College of Medicine, University of Ibadan, Ibadan 200284, Nigeria
5. School of Public Health, University of the Western Cape, Cape Town 7535, South Africa
6. Department of Public Health Sciences, College of Medical Sciences, Rivers State University, Port Harcourt 500101, Nigeria
7. Department of Community Medicine, College of Medical Sciences, Rivers State University, Port Harcourt 500101, Nigeria