[1] Univ Queensland, Prince Charles Hosp, Brisbane, Qld, Australia
[2] Green Lane Hosp, Dept Cardiol, Auckland 3, New Zealand
[3] NHMRC Clin Trials Ctr, Sydney, NSW, Australia
[4] Univ Auckland, Sch Med, Auckland, New Zealand
[5] Royal Perth Hosp, Clin Neurosci Div, Perth, WA, Australia
[6] Heart Fdn Australia, Melbourne, Vic, Australia