Funding for this research was provided by:
Wellcome Trust (200841/Z/16/Z)
Medical Research Foundation (MR/P001092/1)
Text and Data Mining valid from 2020-01-20
Received: 30 July 2019
Accepted: 15 December 2019
First Online: 20 January 2020
: H.G. (AstraZeneca) had a role in research funding and data interpretation. O.C. had a role in data interpretation when working for the University of Cambridge and moved to AstraZeneca during the preparation of the paper. Neither company representatives had a role in data selection for publication. All other authors declare no competing interests.