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Circulating vitamin D concentration and risk of seven cancers: Mendelian randomisation study

BMJ 2017; 359 doi: https://doi.org/10.1136/bmj.j4761 (Published 31 October 2017) Cite this as: BMJ 2017;359:j4761

Re: Circulating vitamin D concentration and risk of seven cancers: Mendelian randomisation study

It is an interesting paper. I was particularly attracted to the OR. All are close to the null value. And all of them are insignificant. Still, the authors claim: "There is little evidence for a linear causal association between circulating vitamin D concentration and risk of various types of cancer". I was interested in reading the peer-reviewers' report. Unfortunately, the peer-reviewers' report annexed in this publication was from another manuscript entitled "Obesity and women’s health: an umbrella review of the literature". I never expected this from the BMJ.

Competing interests: No competing interests

02 November 2017
Mihiretu Kebede
Researcher
University of Bremen