Funding for this research was provided by:
National Health and Medical Research Council (APP1121844)
Received: 13 August 2017
Accepted: 21 December 2017
First Online: 15 January 2018
Ethics approval and consent to participate
: The study protocols were approved by the Human Research Ethics Committees of the University of Newcastle and University of Queensland, Australia. Informed consent was obtained from all participants at each survey.
: Not applicable.
: The authors declare that they have no competing interests.
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