Archives of Family Medicine Archives of Family Medicine is no longer in publication. Online access to this title is now provided through CLOCKSS.

Echinacea Root Extracts for the Prevention of Upper Respiratory Tract Infections: A Double-blind, Placebo-Controlled Randomized Trial
D. Melchart
Archives of Family Medicine(1998),7(6):541
http://dx.doi.org/10.1001/archfami.7.6.541

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