Journal of Public Health and Epidemiology 2141-2316 Academic Journals 10.5897/JPHE2014.0671 S. L. Mndzebel G. A. Tegegn * E-mail: Samuel.mndzebele@embanet.com 2015 31 01 2015 19 08 2014 26 11 2014 7 1 6 14 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/00137E849144 The full text article is available as a PDF file from http://politicalwaffle.uk/journal/JPHE/article-full-text-pdf/00137E849144 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16