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Results by year

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

Year Number of Results
1975 2
1983 1
1984 1
1985 1
1986 1
1989 1
1990 1
1991 1
1994 3
1995 2
1996 1
1997 5
1998 2
1999 3
2000 4
2001 2
2002 1
2003 2
2004 11
2005 6
2006 12
2007 19
2008 17
2009 22
2010 23
2011 35
2012 47
2013 52
2014 70
2015 51
2016 68
2017 73
2018 64
2019 62
2020 73
2021 90
2022 96
2023 74
2024 92
2025 32

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367 results

Results by year

Filters applied: Randomized Controlled Trial, in the last 5 years, Humans, English. Clear all
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367 results