1. Department of Internal Medicine, Hacettepe University School of Medicine, Ankara, Turkey.
2. Azerbaijan Medical University Therapeutic Training Clinic, Baku, Azerbaijan.
3. Department of Biostatistics, Hacettepe University School of Medicine, Ankara, Turkey.
4. Department of Nutrition and Dietetics, Faculty of Health Sciences, Hacettepe University, Ankara, Turkey.
5. Department of Internal Medicine, Division of Endocrinology and Metabolism, Hacettepe University School of Medicine, Ankara, Turkey.