Umut Safer1, Cem Haymana2, Vildan Binay Safer3. 1. Department of Internal Medicine, Gulhane School of Medicine Haydarpasa Training Hospital, 34688, Istanbul, Turkey. 2. Department of Endocrinology and Metabolism, Gulhane School of Medicine, 06018, Etlik, Ankara, Turkey. cemhaymana@hotmail.com. 3. Department of Physical Medicine and Rehabilitation, Haydarpasa Numune Training and Research Hospital, 34688, Istanbul, Turkey.