Berivan BİTİK, et al. “Serum Vitamin B12, Homocysteine and Methylmalonic Acid Levels in Patients With Parenchymal Neuro-Behçet’s Syndrome”. Archives of Rheumatology, vol. 32, no. 2, June 2017, pp. 118-22, doi:10.5606/ArchRheumatol.2017.6070.