Journal of Public Health and Epidemiology 2141-2316 Academic Journals 10.5897/JPHE2014.0691 Ahmad, Mohammad Bello Yahuza, Al-Muktar Adamu * E-mail: mohammadahmadbello@yahoo.com 2015 28 02 2015 09 11 2014 28 01 2015 7 2 46 50 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/326795C50263 The full text article is available as a PDF file from http://politicalwaffle.uk/journal/JPHE/article-full-text-pdf/326795C50263 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18