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
1980 22
1981 18
1982 49
1983 31
1984 45
1985 35
1986 44
1987 31
1988 33
1989 23
1990 34
1991 42
1992 38
1993 34
1994 47
1995 41
1996 47
1997 45
1998 67
1999 54
2000 84
2001 103
2002 124
2003 65
2004 78
2005 67
2006 57
2007 93
2008 98
2009 82
2010 87
2011 84
2012 83
2013 118
2014 93
2015 103
2016 115
2017 105
2018 107
2019 107
2020 151
2021 122
2022 126
2023 112
2024 57

Text availability

Article attribute

Article type

Publication date

Search Results

3,201 results

Results by year

Filters applied: . Clear all
Page 1
3,201 results