Received: 28 May 2019
Accepted: 4 February 2020
First Online: 19 February 2020
Ethics approval and consent to participate
: Ethical approval for the study was provided by the University of Birmingham Research Ethics Committee (Ref ERN_16–0409). All data presented are from those study participants who provided written informed consent to use of their data for research purposes.
: Not applicable.
: Amanda Farley (AF) is a co-investigator on a researcher led grant from Johnson and Johnson. All other study authors have no conflicts of interest relevant to this publication.