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 Custom Filters

Results by year

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

Year Number of Results
1988 1
1989 2
1990 1
1992 2
1994 1
1995 2
1996 1
1997 1
1998 4
1999 3
2000 5
2001 4
2002 3
2003 2
2004 5
2005 6
2006 11
2007 14
2008 15
2009 11
2010 14
2011 19
2012 19
2013 16
2014 24
2015 37
2016 35
2017 34
2018 31
2019 39
2020 37
2021 18
2022 4
2023 3
2024 33
2025 30

Publication date

Text availability

Article attribute

Article type

Additional filters

Article Language

Species

Sex

Age

Other

Search Results

430 results

Results by year

Filters applied: . Clear all
Page 1
430 results