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

Year Number of Results
1968 1
1989 2
1990 3
1992 1
1993 1
1994 1
1995 2
1996 2
1998 2
1999 5
2000 1
2001 2
2002 1
2004 2
2005 3
2007 3
2008 1
2009 2
2010 3
2011 3
2012 6
2013 3
2014 8
2015 10
2016 4
2017 2
2018 1
2019 3
2020 3
2021 1
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Page 1
Guidelines for Inclusion of Patient-Reported Outcomes in Clinical Trial Protocols: The SPIRIT-PRO Extension.
Calvert M, Kyte D, Mercieca-Bebber R, Slade A, Chan AW, King MT; the SPIRIT-PRO Group, Hunn A, Bottomley A, Regnault A, Chan AW, Ells C, O'Connor D, Revicki D, Patrick D, Altman D, Basch E, Velikova G, Price G, Draper H, Blazeby J, Scott J, Coast J, Norquist J, Brown J, Haywood K, Johnson LL, Campbell L, Frank L, von Hildebrand M, Brundage M, Palmer M, Kluetz P, Stephens R, Golub RM, Mitchell S, Groves T. Calvert M, et al. Among authors: regnault a. JAMA. 2018 Feb 6;319(5):483-494. doi: 10.1001/jama.2017.21903. JAMA. 2018. PMID: 29411037 Free article.
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