Okan, S., Türk, A. Ç., Şıvgın, H., Özsoy, F., & Okan, F. (2019). Association of ferritin levels with depression, anxiety, sleep quality, and physical functioning in patients with fibromyalgia syndrome: A cross-sectional study. Croat Med J.

Okan, Sevil, Ayla Çağlıyan Türk, Hakan Şıvgın, Filiz Özsoy, ja Fatih Okan. "Association of Ferritin Levels With Depression, Anxiety, Sleep Quality, and Physical Functioning in Patients With Fibromyalgia Syndrome: A Cross-sectional Study." Croat Med J 2019.

Okan, Sevil, et al. "Association of Ferritin Levels With Depression, Anxiety, Sleep Quality, and Physical Functioning in Patients With Fibromyalgia Syndrome: A Cross-sectional Study." Croat Med J 2019.