Desta Hiko1, Amana Jemal, Morankar Sudhakar, Mirkuzie Woldie Kerie, Tariku Dejene. 1. 1.Lecturer of Epidemiology, Department of Epidemiology, College of Public Health and Medical Science, Jimma University, P.O.Box. 378, Jimma, Ethiopia 2.Lecturer, Department of Environmental Health Science, College of Public Health and Medical Science, Jimma University, P.O.Box 378, Jimma, Ethiopia 3.Professor, Department of Health Education and Behavioral Sciences, Director, Joanna Briggs Center for Evidence Synthesis(Ethiopia), College of Public Health and Medical Sciences, Jimma University, P. O. Box - 378, Jimma, Ethiopia 4.Associate Professor, Dept. of Health Services Management, Core Member of Ethiopia - Joanna Briggs Center for Evidence Synthesis 5.Lecturer of Biostatistics, Department of Epidemiology, Jimma University,Ethiopia P.O. Box. 378. Jimma, Ethiopia.