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
1983 1
1987 2
1988 1
1989 1
1990 1
1991 4
1992 1
1993 2
1994 1
1995 1
1996 2
1997 1
1998 3
1999 2
2000 2
2001 3
2002 3
2003 5
2004 6
2005 10
2006 15
2007 10
2008 14
2009 12
2010 12
2011 10
2012 20
2013 17
2014 18
2015 28
2016 27
2017 27
2018 34
2019 24
2020 37
2021 51
2022 33
2023 19
2024 6

Text availability

Article attribute

Article type

Publication date

Search Results

420 results

Results by year

Filters applied: . Clear all
Page 1
420 results