Funding for this research was provided by:
Health Research Council of New Zealand (17/438)
Cancer Society of New Zealand
Waikato Medical Research Foundation
Text and Data Mining valid from 2020-02-10
Received: 29 October 2019
Accepted: 27 January 2020
First Online: 10 February 2020
Ethics approval and consent to participate
: Ethical approval for the study was granted through the Southern Health and Disability Ethics Committee (HDEC reference: 16/STH/167). As this was a retrospective observational study using anonymised data, individual patient consent was not deemed a requirement by HDEC.
: Not applicable.
: The authors declare that they have no competing interests.