A randomized controlled trial of the effect of fluid extract of Echinacea purpurea on the incidence and severity of colds and respiratory infections ∗∗Access the “Journal Club” discussion of this paper at http://www.elsevier.com/locate/ajmselect/
- 1 February 1999
- journal article
- clinical trial
- Published by Elsevier in American Journal Of Medicine
- Vol. 106 (2), 138-143
- https://doi.org/10.1016/s0002-9343(98)00406-9
Abstract
No abstract availableKeywords
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