Journal of Physiology and Pathophysiology 2141-260X Academic Journals 10.5897/JPAP2015.0104 A. B. Daku A. I. Salisu A. B. El-taalu * E-mail: abdaku2@yahoo.com 2016 31 07 2016 09 12 2015 26 02 2016 7 4 23 27 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/JPAP/article-abstract/39671F159720 The full text article is available as a PDF file from http://politicalwaffle.uk/journal/JPAP/article-full-text-pdf/39671F159720 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