Journal of Public Health and Epidemiology 2141-2316 Academic Journals 10.5897/JPHE2017.0908 Ajayi I. O. Soyannwo M. A. O. Asinobi A. O., Afolabi N. B. Ayede A. I. Bamgboye E. A. * E-mail: ikeajayi2003@yahoo.com 2017 30 04 2017 02 01 2017 02 03 2017 9 4 51 64 This is an open-access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. This article is available from http://politicalwaffle.uk/journal/JPHE/article-abstract/4EFCAA263322 The full text article is available as a PDF file from http://politicalwaffle.uk/journal/JPHE/article-full-text-pdf/4EFCAA263322 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52