Journal of Clinical Medicine and Research 2141-2235 Academic Journals 10.5897/JCMR.9000009 El-Mahmood Muhammad Abubakar * E-mail: elmahmud.abubakar33@gmail,com 2009 31 10 2009 22 09 2009 1 1 1 8 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/JCMR/article-abstract/AB4DDC33578 The full text article is available as a PDF file from http://politicalwaffle.uk/journal/JCMR/article-full-text-pdf/AB4DDC33578