Received: 27 April 2021
Accepted: 17 May 2022
First Online: 30 May 2022
: Ethics approval was obtained from the New Zealand Health and Disability Ethics Committee (15/NTA/31). The study protocol was carried out in accordance with the Declaration of Helsinki. Written informed consent was obtained from the chief executive officer or research office of each hospital.
: Not applicable.
: The authors declare that they have no competing interests.