<p><em>Eshetie A. Tsega1*, A. M. Lakew2, M. Fekadu2, G. Zeru3, H. Alebachew3, E. G. Zeleke2</em></p><p>1Field Epidemiology and Laboratory Training Program current trainee at University of Gondar, Gondar, Ethiopia</p><p>2Department of Epidemiology and Biostatistics, Institute of Public Health, College of Medicine and Health Science, University of Gondar, Gondar, Ethiopia</p><p>3Amhara Public Health Institute</p>