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 2
1982 5
1983 4
1984 1
1985 4
1986 4
1987 3
1988 6
1989 5
1990 14
1991 12
1992 13
1993 16
1994 18
1995 25
1996 23
1997 23
1998 33
1999 29
2000 47
2001 52
2002 43
2003 69
2004 79
2005 94
2006 109
2007 153
2008 168
2009 173
2010 221
2011 309
2012 339
2013 413
2014 456
2015 603
2016 613
2017 716
2018 765
2019 978
2020 1063
2021 1269
2022 1475
2023 1435
2024 595

Text availability

Article attribute

Article type

Publication date

Search Results

11,141 results

Results by year

Filters applied: . Clear all
Page 1
11,141 results
You have reached the last available page of results. Please see the User Guide for more information.