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3. US Food and Drug Administration 2002 www.cfsan.fda.gov/dms/ds-savvy.html
4. Office of Dietary Supplements: National Institutes of Health 2004 http://dietary-supplements.info.nih.gov/factsheets/dietary-supplements.asph1
5. US Food and Drug Administration: Center for Food Safety and Applied Nutrition 2006 www.cfsan.fda.gov/dms/supplmnt.html