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 6
1946 17
1947 10
1948 26
1949 8
1951 34
1952 68
1953 9
1954 9
1955 4
1956 4
1957 10
1958 2
1959 38
1960 95
1961 104
1962 60
1964 1
1965 38
1966 63
1967 51
1968 61
1969 48
1970 72
1971 83
1972 63
1973 61
1974 91
1975 108
1976 81
1977 71
1978 89
1979 108
1980 118
1981 121
1982 136
1983 176
1984 238
1985 219
1986 216
1987 183
1988 172
1989 166
1990 204
1991 233
1992 201
1993 216
1994 202
1995 248
1996 216
1997 213
1998 197
1999 290
2000 237
2001 279
2002 319
2003 362
2004 406
2005 506
2006 548
2007 609
2008 638
2009 617
2010 756
2011 863
2012 815
2013 842
2014 879
2015 828
2016 886
2017 919
2018 922
2019 942
2020 937
2021 858
2022 575
2023 472
2024 327

Text availability

Article attribute

Article type

Publication date

Search Results

19,388 results

Results by year

Filters applied: . Clear all
Page 1
19,388 results
You have reached the last available page of results. Please see the User Guide for more information.
-