Funding for this research was provided by:
National Institute for Health Research (RP-PG 0610-10108)
Text and Data Mining valid from 2019-03-11
Received: 8 February 2018
Accepted: 27 February 2019
First Online: 11 March 2019
Ethics approval and consent to participate
: The investigation conforms to ethical principles. Ethical approval was granted by London-Camberwell St Giles NHS Research Ethics Committee REC Ref [CitationRef removed] LO/0736, 25.02.2016. Participation in this study was voluntary and participants were informed to be free to withdraw from the study at any time. The participants were provided with written information about the study process. Those who willingly agreed to participate in this study completed an online or paper consent form.
: Not applicable.
: The authors declare that they have no competing interests.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.