Sanei Sistani, S., A. Moghtaderi, A. Reza Dashipoor, M. Ghaffarpoor, and B. Heshmat Ghahderijani. “Seasonal Variations of 25-OH Vitamin D Serum Levels in Multiple Sclerosis Patients With Relapse Using MRI”. European Journal of Translational Myology, vol. 29, no. 3, Aug. 2019, doi:10.4081/ejtm.2019.8361.