Text and Data Mining valid from 2019-08-29
Received: 8 November 2018
Accepted: 19 August 2019
First Online: 29 August 2019
Ethics approval and consent to participate
: This research was perceived to be low risk as it used anonymised secondary data from published studies. Nevertheless, the primary studies included in the review were screened for ethics approval.
: Not applicable.
: The authors declare that they have no competing interests.