Funding for this research was provided by:
Text and Data Mining valid from 2019-08-08
Received: 8 January 2019
Accepted: 30 June 2019
First Online: 8 August 2019
Ethics approval and consent to participate
: This study was approved by the NRES committee Yorkshire and the Humber Leeds West (14/YH/1170). Written informed consent was obtained by those individuals that held capacity; otherwise, if a patient met the inclusion criteria but lacked the capacity to consent, we followed the process outlined in the Mental Capacity Act and approved by the NRES committee.
: Not applicable
: SD, DY and RJTW have all received honorarium from Edwards Lifesciences Ltd for lecturing and consultancy work.