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Table representation of search results timeline featuring number of search results per year.

Year Number of Results
2009 2
2010 1
2011 3
2013 2
2014 4
2015 1
2016 2
2021 0
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12 results
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Page 1
Echinacea for preventing and treating the common cold.
Karsch-Völk M, Barrett B, Kiefer D, Bauer R, Ardjomand-Woelkart K, Linde K. Karsch-Völk M, et al. Cochrane Database Syst Rev. 2014 Feb 20;2(2):CD000530. doi: 10.1002/14651858.CD000530.pub3. Cochrane Database Syst Rev. 2014. PMID: 24554461 Free PMC article. Review.
Echinacea for treating the common cold: a randomized trial.
Barrett B, Brown R, Rakel D, Mundt M, Bone K, Barlow S, Ewers T. Barrett B, et al. Ann Intern Med. 2010 Dec 21;153(12):769-77. doi: 10.7326/0003-4819-153-12-201012210-00003. Ann Intern Med. 2010. PMID: 21173411 Free PMC article. Clinical Trial.
12 results