<p>&nbsp;(PhD)2 M. F. (MPH)3&nbsp;</p><p>Ejigu Gebeye Zeleke, Department of Epidemiology and Biostatistics, institute of public health, College of medicine and health sciences, University of Gondar, Ethiopia</p><p>Fantahun Aenew Mekonen, Department of Epidemiology and Biostatistics, institute of public health, College of medicine and health sciences, University of Gondar, Ethiopia</p><p>Mesafnt Fekadu Andargie, Ethiopian Field Epidemiology and Laboratory Training Program Residence Advisory at University of Gondar, College of Medicine and Health Sciences, Gondar, Ethiopia</p>