1 Cardiology, Princess Alexandra Hospital, Brisbane, Australia; The University of Queensland, Australia. Electronic address: mary.boyde@health.qld.gov.au.
2 Health Economics Group, Norwich Medical School, University of East Anglia, Norwich, Norfolk, UK.
3 Cardiology, Princess Alexandra Hospital, Brisbane, Australia; The University of Queensland, Australia.
4 Cardiology, Princess Alexandra Hospital, Brisbane, Australia.
5 Physiotherapy, Princess Alexandra Hospital, Brisbane, Australia.
6 Metro South Medicine and Chronic Disease Health, Brisbane, Australia.