Funding for this research was provided by:
National Health and Medical Research Council (400941, 1093083)
Received: 21 January 2019
Accepted: 12 November 2019
First Online: 27 November 2019
Ethics approval and consent to participate
: The protocol was approved by the Human Studies Ethics Committee HREC 05224 at the University of New South Wales and informed written consent was obtained from all participants.
: Not applicable
: KD is a member of the editorial board for BMC Geriatrics. The authors declare that they have no other competing interests.