1. Department of Gastroenterology; Bozok University Medical School; Yozgat Turkey
2. Department of Gastroenterology; Erciyes University Medical School; Kayseri Turkey
3. Department of Internal Medicine; Bozok University Medical School; Yozgat Turkey
4. Department of Biostatistics; Hacettepe University Medical School; Ankara Turkey
5. Department of Rheumatology; Bozok University Medical School; Yozgat Turkey