Yank V, Rennie D, Bero LA (2007)

Financial ties and concordance between results: retrospective cohort study. BMJ 335:1202-5. doi:10.1136/bmj.39376.447211.
This is the earliest example identified for the Chiu 2017 systematic methodology Review of an observational study assessing the presence of spin in reports of systematic reviews.

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Yank V, Rennie D, Bero LA (2007). Financial ties and concordance between results: retrospective cohort study. BMJ 335:1202-5.

Acknowledgements

The editors are grateful to:

BMJ for allowing the James Lind Library to link to this and other BMJ articles of historical relevance (email to Iain Chalmers from Fiona Godlee, 05 May 2015).

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