Skorupska-Król, A. ., Pejas-Grzybek, L. ., & Oskędra, I. . (2014). Depression and its Severity among Patients with Multiple Sclerosis. The Journal of Neurological and Neurosurgical Nursing, 3(4), 169–174. https://doi.org/10.15225/PNN.2014.3.4.4