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S1
Homocysteine May Trigger Strokes. JS Online. Available online at the following link: http://www.jsonline.com/alive/ap/feb01/ap-stroke-amino-ac021601.asp

S2
Homocysteine: An emerging age-related cardiovascular risk factor. Geriatrics. April 1999.

S3
Donald W. Jacobsen, PhD, FAHA. Director, Laboratory for Homocysteine Research, Department of Cell Biology, Lerner Research Institute, Cleveland Clinic Foundation, Cleveland, OH. (Fellow, American Heart Association; American Association for Clinical Chemistry member).

Sources Used in November 2005 Update

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Picker, J. and Levy, H. (2005 August 15, Updated). Homocystinuria Caused by Cystathionine Beta-Synthase Deficiency [30 paragraphs]. GeneReviews [On-line information]. Available FTP: http://www.genetests.org/query?dz=homocystinuria

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