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
1937 1
1940 1
1958 2
1960 5
1962 5
1963 6
1964 3
1965 5
1966 2
1967 1
1968 1
1969 3
1970 7
1971 5
1972 8
1973 5
1974 6
1975 14
1976 10
1977 10
1978 9
1979 8
1980 14
1981 11
1982 18
1983 21
1984 16
1985 12
1986 29
1987 24
1988 20
1989 14
1990 20
1991 33
1992 36
1993 23
1994 24
1995 34
1996 24
1997 34
1998 53
1999 57
2000 62
2001 61
2002 66
2003 88
2004 104
2005 99
2006 150
2007 184
2008 184
2009 200
2010 227
2011 253
2012 334
2013 359
2014 342
2015 385
2016 471
2017 494
2018 516
2019 562
2020 645
2021 731
2022 878
2023 772
2024 337

Text availability

Article attribute

Article type

Publication date

Search Results

8,229 results

Results by year

Filters applied: . Clear all
Page 1
8,229 results