Gezmen Karadağ, M., Yıldıran, H., Ayyıldız, F., Ertaş Öztürk, Y., Yücalan Girgin, Özgül B., & Toka, O. (2019). Is low serum 25-hydroxyvitamin D associated with attack frequency and duration in migraine and tension-type headache?. Progress in Nutrition, 21(3), 702-708. https://doi.org/10.23751/pn.v21i3.7964