1. CS Mottt Department of Public Health, College of Human Medicine, Michigan State University , Flint, Michigan , USA
2. Department of Psychology, University of Nigeria , Nsukka, Enugu State , Nigeria
3. Department of Social Sciences, Karatina University , Karatina , Kenya
4. Department of Psychology, University of Pretoria , Pretoria , South Africa
5. Department of Sociology, Anthropology and Community Development Studies, South Eastern Kenya University , Kitui , Kenya
6. Institute of Gerontology, University of Vechta , Vechta , Germany
7. Department of Psychology, Federal University Oye-Ekiti , Oye-Ekiti , Nigeria