Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation

Filters

My NCBI Filters

Results by year

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

Year Number of Results
1951 1
1980 1
1981 2
1982 2
1983 1
1984 1
1985 1
1986 1
1987 2
1988 2
1989 3
1990 3
1991 4
1992 4
1993 6
1994 7
1995 6
1996 6
1997 3
1998 4
1999 7
2000 4
2001 4
2002 8
2003 2
2004 3
2005 6
2006 5
2007 4
2008 6
2009 9
2010 10
2011 13
2012 21
2013 24
2014 14
2015 22
2016 23
2017 34
2018 19
2019 30
2020 31
2021 13
2022 12
2023 4
2024 0

Text availability

Article attribute

Article type

Publication date

Similar articles for PMID: 21948030

358 results

Results by year

Filters applied: . Clear all
Page 1
358 results