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. 2009 May 15:291–409. doi: 10.1016/B978-0-323-02998-8.50024-X
Echinacea (immune stimulating, antimicrobial) 35%
Astragalus (immune stimulating) 15%
Fennel or thyme (mucolytic expectorant) 25%
Garlic or elecampane (stimulating expectorant) 25%