DOI:
10.1055/s-00000058
Planta Medica
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References
Lindenmuth GF, Lindenmuth EB.
The efficacy of Echinacea compound herbal tea preparation on the severity and duration of upper respiratory and flu symptoms: A randomized, double-blind placebo-controlled study.
J Altern Complement Med 2000;
6: 327-334
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