Funding for this research was provided by:
Health Technology Assessment Programme (14/159/07)
Article History
First Online: 12 March 2018
Compliance with Ethical Standards
:
: Adam Martin, Rupert Payne and Edward Wilson declare that they have no conflict of interest.
: This research was supported by a grant from the National Institute for Health Research (NIHR), Health Technology Assessment funding stream (Grant Reference: NIHR HTA 14/159/07).