Funding for this research was provided by:
National Institute for Health Research (RP-PG-1211-20012)
Received: 1 April 2018
Accepted: 17 December 2018
First Online: 12 February 2019
Ethics approval and consent to participate
: Ethical (NRES Committee North East - Newcastle & North Tyneside 1, reference: 15/NE/0309) and NHS approvals have been granted. Written informed consent is obtained for patient participation as detailed above.
: Not applicable.
: The authors declare that they have no competing interests.
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