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
1991 2
1992 2
1994 1
1996 1
1998 2
1999 2
2000 1
2001 1
2002 1
2003 3
2004 3
2005 3
2006 4
2007 4
2008 5
2009 3
2010 3
2011 6
2012 7
2013 1
2014 1
2015 4
2016 1
2017 2
2018 1
2019 3
2020 4
2023 1
2024 0

Text availability

Article attribute

Article type

Publication date

Search Results

67 results

Results by year

Filters applied: . Clear all
Page 1
Trial recruitment a continuing challenge.
Tugwell P, Knottnerus A. Tugwell P, et al. Among authors: knottnerus a. J Clin Epidemiol. 2019 Sep;113:vi-viii. doi: 10.1016/j.jclinepi.2019.07.018. J Clin Epidemiol. 2019. PMID: 31470965 No abstract available.
Farewell to Peter Tugwell, welcome to Andrea Tricco.
Knottnerus A, Tovey D. Knottnerus A, et al. J Clin Epidemiol. 2023 Jan;153:A1-A2. doi: 10.1016/j.jclinepi.2022.12.026. J Clin Epidemiol. 2023. PMID: 36702568 No abstract available.
What is 'best evidence'?
Tugwell P, Knottnerus A, Idzerda L. Tugwell P, et al. Among authors: knottnerus a. J Clin Epidemiol. 2012 Nov;65(11):1131-2. doi: 10.1016/j.jclinepi.2012.08.002. J Clin Epidemiol. 2012. PMID: 23017631 Free article. No abstract available.
TIDieR-Placebo: A guide and checklist for reporting placebo and sham controls.
Howick J, Webster RK, Rees JL, Turner R, Macdonald H, Price A, Evers AWM, Bishop F, Collins GS, Bokelmann K, Hopewell S, Knottnerus A, Lamb S, Madigan C, Napadow V, Papanikitas AN, Hoffmann T. Howick J, et al. Among authors: knottnerus a. PLoS Med. 2020 Sep 21;17(9):e1003294. doi: 10.1371/journal.pmed.1003294. eCollection 2020 Sep. PLoS Med. 2020. PMID: 32956344 Free PMC article.
67 results