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
1972 2
1978 1
1987 1
1988 1
1990 4
1991 1
1994 2
1995 5
1996 3
1997 3
2000 2
2002 5
2003 9
2004 15
2005 17
2006 24
2007 36
2008 48
2009 73
2010 93
2011 77
2012 131
2013 152
2014 217
2015 301
2016 326
2017 376
2018 454
2019 547
2020 693
2021 824
2022 1043
2023 1045
2024 462

Text availability

Article attribute

Article type

Publication date

Search Results

6,248 results

Results by year

Filters applied: . Clear all
Page 1
6,248 results