<p>Tsegazeab A.1, K.Gebremariam2 and K.Tesfay2</p><p>Department of Epidemiology, School of public health, College of Health Sciences, Mekelle University, Mekelle, Ethiopia,</p><p><a href="mailto:araya.tsegazeab22@gmail.com">araya.tsegazeab22@gmail.com</a> <a href="mailto:kidanumeles2008@gmail.com">kidanumeles2008@gmail.com</a> and <a href="mailto:tesfaykissanet@gmail.com">tesfaykissanet@gmail.com</a></p>