Yusuf O. B.1*, Arulogun O. S.2, Oladepo O.2 and Olowokeere F.1
1Department of Epidemiology and Medical Statistics, College of Medicine, University of Ibadan, Ibadan, Oyo State, Nigeria.
2Department of Health promotion and Education, College of Medicine, University of Ibadan, Oyo State, Nigeria.
