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
1967 1
1974 1
1975 3
1976 3
1977 5
1978 6
1979 5
1980 7
1981 6
1982 2
1983 6
1984 11
1985 5
1986 10
1987 6
1988 5
1989 10
1990 14
1991 14
1992 10
1993 11
1994 13
1995 10
1996 18
1997 14
1998 11
1999 22
2000 11
2001 20
2002 15
2003 11
2004 21
2005 24
2006 18
2007 23
2008 30
2009 26
2010 30
2011 39
2012 32
2013 40
2014 30
2015 32
2016 43
2017 26
2018 39
2019 24
2020 37
2021 26
2022 37
2023 41
2024 21

Text availability

Article attribute

Article type

Publication date

PubMed for id: 2661

823 results

Results by year

Filters applied: . Clear all
Page 1
823 results