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

Year Number of Results
1998 1
1999 2
2000 2
2002 1
2003 3
2004 1
2005 3
2006 2
2007 4
2008 4
2009 6
2010 12
2011 11
2012 12
2013 10
2014 4
2015 8
2016 5
2017 15
2018 8
2019 2
2020 10
2021 4
2022 1
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Similar articles for PMID: 21868617

112 results
Results by year
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112 results