<p>Prof. Ahmed Ali Ahmed2, Dr. Muluken Gizaw3 &amp; Dr. Gizaw Teka4&nbsp;<br><br></p><p><em>&nbsp;Addis Ababa University, School of Public Health, Addis Ababa, Ethiopia2, Addis Ababa University, School of Public Health, Addis Ababa Ethiopia3 Ethiopian Public Health Institute, Addis Ababa, Ethiopia4</em></p><p>&nbsp;<a href="mailto:ahmedaa5050@yahoo.com2">ahmedaa5050@yahoo.com2</a>, <a href="mailto:muluken.gizaw@yahoo.com3">muluken.gizaw@yahoo.com3</a>, <a href="mailto:gizawt982@gmail.com4">gizawt982@gmail.com4</a> &nbsp;</p>