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

Search Page

Filters

My NCBI Filters

Results by year

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

Year Number of Results
1981 3
1982 3
1983 2
1984 2
1985 4
1986 6
1987 10
1988 15
1989 11
1990 11
1991 9
1992 21
1993 31
1994 32
1995 25
1996 23
1997 10
1998 25
1999 20
2000 36
2001 31
2002 43
2003 64
2004 70
2005 121
2006 116
2007 140
2008 169
2009 174
2010 238
2011 246
2012 291
2013 338
2014 396
2015 392
2016 402
2017 462
2018 474
2019 553
2020 653
2021 779
2022 950
2023 961
2024 432

Text availability

Article attribute

Article type

Publication date

Search Results

7,886 results

Results by year

Filters applied: . Clear all
Page 1
7,886 results