Received: 21 June 2019
Accepted: 14 October 2019
First Online: 24 October 2019
Ethics approval and consent to participate
: This study did not require any ethical approval in New Zealand. Participants from the four countries who participated also ensured no ethical approval was necessary in their respective countries.
: Consent was taken from participants individually when the questionnaire was sent.
: The authors declare that they have no competing interests.