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

Year Number of Results
1995 1
1997 1
1998 1
1999 4
2000 4
2001 3
2002 1
2003 5
2004 5
2005 10
2006 6
2007 6
2008 7
2009 3
2010 7
2011 9
2012 9
2013 5
2014 5
2015 8
2016 7
2017 1
2018 2
2019 4
2021 1
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Similar articles for PMID: 21737670

105 results
Results by year
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105 results