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
1991 3
1992 2
1993 5
1994 6
1995 5
1996 9
1997 2
1998 8
1999 12
2000 6
2001 8
2002 15
2003 14
2004 17
2005 17
2006 14
2007 17
2008 21
2009 11
2010 13
2011 13
2012 19
2013 19
2014 14
2015 11
2016 17
2017 10
2018 13
2019 12
2020 7
2021 6
2022 5
2023 4
2024 4

Text availability

Article attribute

Article type

Publication date

Search Results

324 results

Results by year

Filters applied: . Clear all
Page 1
324 results