Cengiz Beyan1, Esin Beyan2. 1. Faculty of Medicine, Ufuk University, Cigdem Mahallesi, 1551. Cadde, Iskent sitesi, No: 7/7, 06520, Cankaya, Ankara, Turkey. cengizbeyan@hotmail.com. 2. Kecioren Training and Research Hospital, Department of Internal Medicine, University of Health Sciences, Ankara, Turkey.