... interests The authors declare that they have no competing interests.Authors' contributionsKA conception and design of the work, generation and analysis of data, GA generation and data analysis and commented ... Ababa, Ethiopia: a cross-sectional study Kemal Ahmed1, Gonfa Ayana2 and Ephrem Engidawork*1Address: 1Department of Pharmacology, School of Pharmacy, Addis Ababa University, Addis Ababa, ... Ababa, Ethiopia and 2Department of Clinical Chemistry, Ethiopian Health and Nutrition Research Institute, Addis Ababa, EthiopiaEmail: Kemal Ahmed - kemalfenet@yahoo.com; Gonfa Ayana - gonfaayana@yahoo.com;...