DOI:
10.1055/s-00000058
Planta Medica
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References
Karsch-Völk M, Barrett B, Kiefer D, Bauer R, Ardjomand-Woelkart K, Linde K.
Echinacea for preventing and treating the common cold.
Cochrane Database Syst Rev 2014; (2) CD000530
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