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

Filters

My NCBI Filters

Results by year

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

Year Number of Results
1974 1
1979 1
1981 1
1982 1
1984 1
1986 7
1987 13
1988 17
1989 48
1990 54
1991 41
1992 52
1993 67
1994 61
1995 53
1996 67
1997 59
1998 47
1999 47
2000 41
2001 38
2002 19
2003 32
2004 34
2005 22
2006 6
2007 11
2008 19
2009 19
2010 22
2011 25
2012 18
2013 8
2014 9
2015 10
2016 7
2017 6
2018 6
2019 9
2020 11
2021 14
2022 8
2023 2
2024 0

Text availability

Article attribute

Article type

Publication date

Similar articles for PMID: 8970984

1,000 results

Results by year

Filters applied: . Clear all
Page 1
1,000 results