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
1946 6
1947 3
1948 5
1949 5
1950 6
1951 12
1952 10
1953 7
1954 3
1955 11
1956 12
1957 8
1958 9
1959 15
1960 15
1961 12
1962 16
1963 51
1964 65
1965 58
1966 75
1967 80
1968 92
1969 112
1970 110
1971 113
1972 154
1973 163
1974 172
1975 157
1976 186
1977 194
1978 191
1979 250
1980 266
1981 279
1982 323
1983 379
1984 348
1985 366
1986 348
1987 312
1988 297
1989 378
1990 331
1991 337
1992 327
1993 305
1994 336
1995 319
1996 279
1997 283
1998 265
1999 267
2000 249
2001 274
2002 246
2003 260
2004 235
2005 230
2006 243
2007 230
2008 238
2009 217
2010 177
2011 192
2012 164
2013 134
2014 145
2015 162
2016 138
2017 141
2018 129
2019 109
2020 124
2021 104
2022 114
2023 104
2024 45

Text availability

Article attribute

Article type

Publication date

Search Results

12,712 results

Results by year

Filters applied: . Clear all
Page 1
12,712 results
You have reached the last available page of results. Please see the User Guide for more information.
-