Text and Data Mining valid from 2019-12-01
Received: 7 December 2018
Accepted: 9 October 2019
First Online: 2 December 2019
Ethics approval and consent to participate
: The trial was approved by the London – Camden and Kings Cross NHS Research Ethics Committee (reference no. 15/LO/1999) in November 2016. Full written informed consent will be given by all participants for both participation and publication of the results. This will include a reminder that participants can withdraw at any time, and their data will be stored anonymously and securely in locked filing cabinets and password-protected hard drives in accordance with the UK Data Protection Act and the EU General Data Protection Regulation. All published data will remain anonymous. Recruitment had been completed by the time of reviewing the proofs of this paper.
: The authors declare that they have no competing interests.