Cengiz Beyan1, Esin Beyan2. 1. Ufuk University Faculty of Medicine, Cigdem Mahallesi, 1551. Cadde, Iskent sitesi, No: 7/7, Cankaya, 06530, Ankara, Turkey. cengizbeyan@hotmail.com. 2. Department of Internal Medicine, Kecioren Training and Research Hospital, University of Health Sciences, Ankara, Turkey.