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National Survey on Public Attitudes and Use of Dietary Supplements

The NPR/Kaiser Family Foundation/Kennedy School of Government NationalSurvey on Americans and Dietary Supplements was designed by staff at NationalPublic Radio, Kaiser Family Foundation, and the Kennedy School of Government andconducted by Princeton Survey Research Associates. The survey was conduced bytelephone with 1,200 adults (age 18 or older) nationwide between February 19 andFebruary 25, 1999. The margin of sampling error is plus or minus 3 percentagepoints.