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How to interpret studies using Mendelian randomisation

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  • JIS and H-HW are joint senior authors.

  • Twitter @MinSeoKim_MD

  • Contributors MSK, JIS and H-HW contributed to the concept and design of this study. MSK drafted the manuscript. JIS and H-HW supervised the study. MSK, MS, JIS and H-HW participated in the critical revision of the manuscript.

  • Funding The authors have not declared a specific grant for this research from any funding agency in the public, commercial or not-for-profit sectors.

  • Disclaimer All authors have completed the ICMJE uniform disclosure form at (available on request from the corresponding author) and declare the following: no support from any organisation for the submitted work; no financial relationships with any organisations that might have an interest in the submitted work in the previous three years; no other relationships or activities that could appear to have influenced the submitted work.

  • Competing interests None declared.

  • Provenance and peer review Commissioned; externally peer reviewed.