E. Hamdy, I. Ramadan, J. Mekky, A. Abdel Galeel, and D. Gaber, “Serum Matrix Metalloproteinase-9 Level and Previous Disease Activity in Relapsing-Remitting Multiple Sclerosis: MMP-9 and Past-Year Activity in MS”, Int Clin Neurosci J, vol. 10, no. 1, p. e5, Mar. 2023.