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

Year Number of Results
1947 1
1949 1
1950 1
1952 1
1955 3
1956 1
1978 1
1989 1
1990 1
1992 1
1993 1
1994 1
1995 1
1996 1
1997 4
1998 1
1999 6
2000 5
2001 6
2002 5
2003 11
2004 5
2005 7
2006 11
2007 7
2008 18
2009 17
2010 12
2011 17
2012 22
2013 16
2014 16
2015 16
2016 21
2017 23
2018 15
2019 14
2020 11
2021 9
Text availability
Article attribute
Article type
Publication date

Similar articles for PMID: 21551396

268 results
Results by year
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268 results
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