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

My NCBI Filters
Results by year

Table representation of search results timeline featuring number of search results per year.

Year Number of Results
1977 9
1978 28
1979 34
1980 24
1981 22
1982 24
1983 11
1984 12
1985 7
1986 10
1987 4
1988 11
1989 7
1990 4
1991 9
1992 6
1993 6
1994 2
1995 4
1996 3
1997 1
1998 5
1999 2
2000 3
2001 4
2002 2
2003 4
2004 3
2005 4
2006 2
2007 1
2008 5
2009 5
2010 6
2011 6
2012 4
2013 5
2014 7
2015 4
2016 1
2017 2
2018 2
2019 1
2020 1
2021 6
2022 3
2023 0
Text availability
Article attribute
Article type
Publication date

Search Results

317 results
Results by year
Filters applied: . Clear all
Page 1
317 results