1. Department of Internal Medicine, University of Yüzüncü Yõl, Medical Faculty, Van, Turkey; Yüzüncü Yil Universitesi Tip Fakultesi, Van 65300, Turkey;
2. Department of Internal Medicine, University of Yüzüncuü Yil, Medical Faculty, Van, Turkey
3. Department of Family Medicine, University of Yüzüncü Yil, Medical Faculty, Van, Turkey
4. Department of Biochemistry, University of Yüzüncü Yil, Medical Faculty, Van, Turkey
5. Department of Internal Medicine, University of Yüzüncü Yil, Medical Faculty, Van, Turkey