Funding for this research was provided by:
Health Services and Delivery Research Programme (11/1023/01)
unspecified valid from 2018-05-22
First Online: 22 May 2018
Change Date: 5 March 2019
Change Type: Correction
Change Details: The Open Access license, which previously read.
Compliance with Ethical Standards
: José Leal, Stefania Manetti and James Buchanan declare that they have no conflicts of interest.
: This project was funded by the NIHR Health Services and Delivery Research programme (project number 11/1023/01).
: Ethical approval was not required for this study.