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 Custom Filters

Results by year

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

Year Number of Results
1978 3
1979 3
1980 10
1981 17
1982 22
1983 13
1984 8
1985 10
1986 14
1987 8
1988 7
1989 3
1990 3
1992 3
1994 2
1998 1
1999 1
2002 1
2003 3
2004 1
2007 1
2008 1
2010 1
2025 0

Publication date

Text availability

Article attribute

Article type

Additional filters

Article Language

Species

Sex

Age

Other

Similar articles for PMID: 6976421

136 results

Results by year

Filters applied: . Clear all
Page 1
136 results