Reference:
1. Parfit K, editor. Martindale. 32nd ed. London: Pharmaceutical press; 1999. p. 1363-4.
2. Ubbink JB, Merwe A, Vermaak WJH, Delport R. Hyperhomocysteinemia and the response to vitamin supplementation. Clin Investig 1993;71:993-998.
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