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
1945 1
1947 2
1950 2
1951 1
1952 1
1953 2
1955 1
1958 1
1959 1
1960 5
1961 1
1964 3
1978 1
1980 5
1981 7
1982 6
1983 24
1984 26
1985 18
1986 28
1987 44
1988 42
1989 36
1990 27
1991 42
1992 49
1993 37
1994 51
1995 33
1996 59
1997 37
1998 101
1999 137
2000 181
2001 221
2002 276
2003 289
2004 406
2005 544
2006 612
2007 754
2008 822
2009 1033
2010 1257
2011 1328
2012 1530
2013 1771
2014 1924
2015 2037
2016 2155
2017 2321
2018 2482
2019 2897
2020 3411
2021 3732
2022 4205
2023 4345
2024 2577

Text availability

Article attribute

Article type

Publication date

Search Results

37,894 results

Results by year

Filters applied: . Clear all
Page 1
37,894 results
You have reached the last available page of results. Please see the User Guide for more information.
-