Research
“Hardly worth the effort”? Medical journals’ policies and their editors’ and publishers’ views on trial registration and publication bias: quantitative and qualitative study
BMJ 2013; 347 doi: https://doi.org/10.1136/bmj.f5248 (Published 06 September 2013) Cite this as: BMJ 2013;347:f5248
Data supplement
Web Extra
Extra material supplied by the author
Files in this Data Supplement:
- Data Supplement - Journals included in quantitative analysis
- Data Supplement - Journals included by requirements for trial registration and whether they stated that trials must comply with Declaration of Helsinki
- Data Supplement - Publication bias: interview questions
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