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Echinacea Research
Effectiveness of an Herbal Preparation Containing Echinacea, Propolis, and Vitamin C in Preventing Respiratory Tract Infections in Children, A Randomized, Double-blind, Placebo-Controlled, Multicenter Study
Efficacy of a standardized echinacea preparation (Echinilin) for the treatment of the common cold: a randomized, double-blind, placebo-controlled trial.
An evaluation of Echinacea angustifolia in experimental rhinovirus infections.
Echinacea for preventing and treating the common cold.
Immune System Effects of Echinacea, Ginseng, and Astragalus: A Review
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