Funding for this research was provided by:
Northern Ireland Health and Social Care Research and Development Office (STL/4936/14)
Medical Research Council UI (MR/K003364/1)
Text and Data Mining valid from 2020-01-31
Received: 3 September 2019
Accepted: 30 December 2019
First Online: 31 January 2020
Ethics approval and consent to participate
: Ethics Committee approval was obtained from the Office for Research Ethics Committees Northern Ireland (Study ID 14/NI/1132) and conformed to the guidelines of the 1975 Declaration of Helsinki. Only participants who provided written informed consent were included in this study.
: Not applicable.
: The authors declare that they have no competing interests.