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

Year Number of Results
1982 1
1984 1
1985 2
1986 1
1987 2
1988 4
1989 1
1990 3
1991 6
1992 3
1993 4
1994 6
1995 6
1996 6
1997 15
1998 14
1999 13
2000 21
2001 16
2002 23
2003 35
2004 40
2005 52
2006 45
2007 56
2008 62
2009 82
2010 95
2011 111
2012 110
2013 111
2014 171
2015 217
2016 222
2017 279
2018 311
2019 387
2020 461
2021 474
2022 460
2023 1
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3,532 results
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Page 1
COVID-19: risk factors for severe cases of the Delta variant.
Hu K, Lin L, Liang Y, Shao X, Hu Z, Luo H, Lei M. Hu K, et al. Among authors: shao x. Aging (Albany NY). 2021 Oct 28;13(20):23459-23470. doi: 10.18632/aging.203655. Epub 2021 Oct 28. Aging (Albany NY). 2021. PMID: 34710058 Free PMC article.
3,532 results