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

Year Number of Results
1993 1
1996 1
1999 1
2000 4
2002 2
2003 1
2004 1
2005 1
2006 4
2007 3
2008 2
2009 3
2010 7
2011 7
2012 18
2013 18
2014 11
2015 5
2016 6
2017 9
2018 17
2019 10
2020 6
2021 11
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Similar articles for PMID: 21372209

130 results
Results by year
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130 results