[1] Deakin Univ, Sch Nursing & Midwifery, Geelong, Vic 3217, Australia
[2] Univ Sydney, NHMRC Clin Trials Cntr, Sydney, NSW 2006, Australia
[3] Univ Heart Cntr Hamburg, Dept Gen & Intervent Cardiol, Hamburg, Germany
[4] Univ Queensland, Brisbane, Qld, Australia
[5] Auckland City Hosp, Green Lane Cardiovasc Serv, Auckland, New Zealand