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

Year Number of Results
1977 1
1981 3
1982 4
1983 6
1984 9
1985 8
1986 8
1987 9
1988 17
1989 22
1990 27
1991 26
1992 17
1993 21
1994 18
1995 24
1996 18
1997 20
1998 23
1999 13
2000 14
2001 13
2002 15
2003 11
2004 8
2005 11
2006 12
2007 26
2008 14
2009 14
2010 11
2011 8
2012 10
2013 10
2014 10
2015 4
2016 9
2017 7
2018 1
2019 3
2020 4
2021 2
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500 results
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Page 1
Distinguishing case series from cohort studies.
Dekkers OM, Egger M, Altman DG, Vandenbroucke JP. Dekkers OM, et al. Among authors: vandenbroucke jp. Ann Intern Med. 2012 Jan 3;156(1 Pt 1):37-40. doi: 10.7326/0003-4819-156-1-201201030-00006. Ann Intern Med. 2012. PMID: 22213493
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