Funding for this research was provided by:
Cancer Research UK (C1298/A8362)
National Institutes of Health (P30CA125123, R01CA139020, R01CA52689, P50097257)
Fifth Framework Programme
Received: 24 October 2017
Accepted: 16 February 2018
First Online: 15 March 2018
Ethics approval and consent to participate
: Two-sample Mendelian randomisation was undertaken using GWAS data. Ethical approval was not sought for this specific project because all data came from the summary statistics of published GWAS, and no individual-level data were used.
: Not applicable.
: The authors declare that they have no competing interests.
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