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
1951 6
1952 9
1953 5
1954 13
1955 7
1956 14
1957 16
1958 13
1959 13
1960 8
1961 10
1962 10
1966 14
1967 22
1968 15
1969 22
1970 18
1971 25
1972 28
1973 16
1974 26
1975 12
1976 19
1977 28
1978 16
1979 28
1980 30
1981 33
1982 51
1983 30
1984 43
1985 55
1986 78
1987 75
1988 71
1989 80
1990 100
1991 86
1992 84
1993 89
1994 83
1995 79
1996 84
1997 80
1998 101
1999 129
2000 138
2001 139
2002 191
2003 220
2004 242
2005 299
2006 320
2007 361
2008 406
2009 503
2010 441
2011 460
2012 473
2013 600
2014 556
2015 584
2016 575
2017 579
2018 571
2019 502
2020 362
2021 223
2022 33
2023 8
2024 3

Text availability

Article attribute

Article type

Publication date

Search Results

9,460 results

Results by year

Filters applied: . Clear all
Page 1
[No title available]
[No authors listed] [No authors listed] PMID: 30881524 Free article.
[No title available]
[No authors listed] [No authors listed] PMID: 29153201
[No title available]
[No authors listed] [No authors listed] PMID: 28345158 Free article.
[No title available]
[No authors listed] [No authors listed] PMID: 29511896
[No title available]
[No authors listed] [No authors listed] PMID: 29153204
[No title available]
[No authors listed] [No authors listed] PMID: 29392578
[No title available]
[No authors listed] [No authors listed] PMID: 33847266 Free article.
[No title available]
[No authors listed] [No authors listed] PMID: 22214745
[No title available]
[No authors listed] [No authors listed] PMID: 29153199
[No title available]
[No authors listed] [No authors listed] PMID: 32662289
9,460 results