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

Year Number of Results
1986 1
1988 1
1995 1
1996 1
1998 2
1999 3
2000 6
2001 5
2002 5
2003 10
2004 8
2005 12
2006 7
2007 10
2008 5
2009 1
2010 8
2011 6
2012 7
2013 3
2014 7
2015 6
2016 5
2017 4
2018 7
2019 14
2020 17
2021 6
Text availability
Article attribute
Article type
Publication date

Similar articles for PMID: 21747102

157 results
Results by year
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Page 1
Placebo effects and the common cold: a randomized controlled trial.
Barrett B, Brown R, Rakel D, Rabago D, Marchand L, Scheder J, Mundt M, Thomas G, Barlow S. Barrett B, et al. Ann Fam Med. 2011 Jul-Aug;9(4):312-22. doi: 10.1370/afm.1250. Ann Fam Med. 2011. PMID: 21747102 Free PMC article. Clinical Trial.
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.
157 results
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