Kızılarslanoğlu, M. C., and M. E. Kuyumcu. “Vitamin D and Parathyroid Hormone Levels in Prediction of the Prevalence of Cerebrovascular Accident in Geriatric Patients”. Acta Medica, vol. 45, no. 1, Jan. 2014, pp. 10-15, https://actamedica.org/index.php/actamedica/article/view/136.