Nicholson, B. D. http://orcid.org/0000-0003-0661-7362
Oke, J. L.
Aveyard, P.
Hamilton, W. T.
Hobbs, F. D. R.
Article History
Received: 12 October 2020
Revised: 24 December 2020
Accepted: 13 January 2021
First Online: 9 February 2021
Ethical approval and consent to participate
: This study was approved by the Independent Scientific Application Committee for MHRA database research (ISAC) protocol number 16_164A2A. The study was performed in accordance with the Declaration of Helsinki. Consent to publish Not applicable.
: Not applicable.
: This study is based on CPRD data and is subject to a full licence agreement, which does not permit data sharing outside of the research team.
: The authors declare no competing interests.
: B.D.N. is supported by National Institute for Health Research (NIHR) Doctoral Research Fellowship number (DRF-2015-08-18). P.A. is an NIHR senior investigator and is funded by NIHR Oxford Biomedical Research Centre and the NIHR Applied Research Collaboration (ARC) for Oxford and Thames Valley. W.H. is co-Principal Investigator of the multi-institutional CanTest Research Collaborative funded by a Cancer Research UK Population Research Catalyst award (C8640/A23385). F.D.R.H. acknowledges his part-funding from the National Institute for Health Research (NIHR) School for Primary Care Research, the NIHR ARC for Oxford and Thames Valley, the NIHR Oxford Biomedical Research Centre (BRC, UHT) and the NIHR Oxford Medtech and InVitro Diagnostics Co-operative (MIC). The views expressed are those of the authors and not necessarily those of the NHS, the NIHR or the Department of Health.