Funding for this research was provided by:
National Institute for Health Research (NIHR) Oxford Biomedical Research Centre (NIHR-BRC-1215-20008)
Medical Research Council (MRC) Network of Hubs for Trials Methodology Research (MR/L004933/1-N66)
Text and Data Mining valid from 2019-02-11
Received: 30 August 2018
Accepted: 7 January 2019
First Online: 11 February 2019
: The Health Services Research Unit, University of Aberdeen, is core funded by the Chief Scientist Office of the Scottish Government Health Directorates.
: The project was reviewed and approved by the University of Oxford Central University Research Ethics Committee (reference number: MS-IDREC-C1–2015-163). Informed consent was built into the beginning of the online survey, and was provided in writing by focus group and interview participants.
: Informed consent for the publication of anonymous data was provided by all participants.
: The authors declare that they have no competing interests.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.