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

Year Number of Results
1951 1
1991 1
1999 1
2001 2
2002 1
2003 8
2004 9
2005 6
2006 9
2007 17
2008 11
2009 9
2010 17
2011 13
2012 22
2013 31
2014 25
2015 15
2016 14
2017 11
2018 9
2019 7
2020 1
2021 1
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Similar articles for PMID: 20501787

230 results
Results by year
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