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

Year Number of Results
1950 1
1988 1
1991 2
1992 2
1993 3
1994 4
1995 1
1996 2
1997 2
1998 8
1999 7
2000 8
2001 14
2002 8
2003 7
2004 5
2005 9
2006 7
2007 11
2008 12
2009 18
2010 14
2011 30
2012 27
2013 36
2014 50
2015 51
2016 68
2017 61
2018 51
2019 45
2020 33
2021 12
Text availability
Article attribute
Article type
Publication date

Similar articles for PMID: 21502225

511 results
Results by year
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