1. Demography and Social Statistics Department, Faculty of Social Sciences, Federal University Oye-Ekiti, Oye-Ekiti, Nigeria
2. Demography and Population Studies Programme, Schools of Public Health and Social Sciences, University of the Witwatersrand, Johannesburg, South Africa
3. Demography and Social Statistics Department, Faculty of Social Sciences, Obafemi Awolowo University, Ile-Ife, Nigeria
4. Department of Community Health, College of Health Sciences, Obafemi Awolowo University, Ile-Ife, Nigeria