| http://www.w3.org/ns/prov#value | - 2000 for the agency by Dr. Alexander M. Walker, then the chairman of epidemiology at the Harvard School of Public Health, concluded: ''A best estimate is that less than 1 percent of serious adverse events caused by dietary supplements is reported to the F.D.A. The true proportion may well be smaller by an order of magnitude or more.'' The supplements linked to the most reactions in 2005, accordin
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