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 3
1946 9
1947 7
1948 9
1949 8
1950 26
1951 20
1952 24
1953 24
1954 34
1955 19
1956 16
1957 20
1958 16
1959 18
1960 21
1961 22
1962 25
1963 34
1964 51
1965 57
1966 56
1967 60
1968 63
1969 77
1970 70
1971 67
1972 64
1973 51
1974 46
1975 67
1976 38
1977 45
1978 28
1979 43
1980 34
1981 24
1982 23
1983 34
1984 38
1985 38
1986 36
1987 41
1988 42
1989 42
1990 40
1991 30
1992 37
1993 29
1994 39
1995 25
1996 26
1997 40
1998 30
1999 57
2000 74
2001 72
2002 77
2003 80
2004 90
2005 106
2006 141
2007 145
2008 129
2009 151
2010 168
2011 205
2012 232
2013 252
2014 256
2015 258
2016 251
2017 291
2018 293
2019 331
2020 353
2021 332
2022 428
2023 268
2024 159

Text availability

Article attribute

Article type

Publication date

Search Results

6,280 results

Results by year

Filters applied: . Clear all
Page 1
6,280 results
-