Received: 15 May 2020
Accepted: 1 July 2020
First Online: 8 July 2020
: All authors have completed the International Committee of Medical Journal Editors (ICMJE) uniform disclosure form at www.icmje.org/coi_disclosure.pdf. C.B., J.P., F.H., J.C. and S.H. are employees of TPP. A.M. was interim Chief Medical Officer of NHS Digital April–Sept 2019 (left NHS Digital at the end of January 2020) and Digital Clinical Champion NHS England 2014–2015. All other authors have no competing interests.
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