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
1948 1
1951 1
1952 1
1957 2
1958 2
1960 2
1964 1
1965 4
1972 2
1973 2
1974 3
1975 1
1976 2
1977 1
1979 1
1980 1
1982 3
1983 4
1984 2
1985 4
1986 3
1987 4
1988 6
1989 3
1990 3
1991 4
1992 5
1993 4
1994 5
1995 2
1996 9
1997 15
1998 6
1999 6
2000 12
2001 8
2002 6
2003 5
2004 8
2005 11
2006 19
2007 10
2008 26
2009 32
2010 22
2011 17
2012 10
2013 21
2014 12
2015 16
2016 24
2017 22
2018 17
2019 23
2020 21
2021 20
2022 23
2023 20
2024 10

Text availability

Article attribute

Article type

Publication date

Search Results

476 results

Results by year

Filters applied: . Clear all
Page 1
476 results