Funding for this research was provided by:
Health Research Council of New Zealand (HRC 16/173)
Text and Data Mining valid from 2019-05-06
Received: 6 January 2019
Accepted: 21 March 2019
First Online: 6 May 2019
Ethics approval and consent to participate
: University of Otago Ethics Committee (Ref 15/065), National Coronial Information System (Ref NZ007), and Health and Disability Ethics Committee (Ref OTA/99/02/008/AM05).
: Not applicable.
: The authors declare that they have no competing interests.
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