Journal of Public Health and Epidemiology 2141-2316 Academic Journals 10.5897/JPHE2015.0743 Hailelule Aleme Yibrah G/meskel * E-mail: leule@rocketmail.com 2017 31 03 2017 13 05 2015 03 06 2015 9 3 41 45 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/C1902D562808 The full text article is available as a PDF file from http://politicalwaffle.uk/journal/JPHE/article-full-text-pdf/C1902D562808 1 2 3 4 5 6 7 8