Fekih-Mrissa N, Mrad M, Klai S, Mansour M, Nsiri B, Gritli N, Mrissa R. Methylenetetrahydrofolate Reductase (C677T and A1298C) Polymorphisms, Hyperhomocysteinemia, and Ischemic Stroke in Tunisian Patients. Journal of Stroke and Cerebrovascular Diseases. 2013 May;22(4):465–9. doi: 10.1016/j.jstrokecerebrovasdis.2013.03.011.