1. Department of Cardiology, Blacktown Hospital, Australia (A.B., S.K., H.H.L.C., A.G., G.C.H.G., A.R.D., T.C.T.).
2. School of Public Health and Community Medicine, University of New South Wales, Sydney, Australia (A.B., G.C.H.G., C.R.M.).
3. Department of Cardiology, Westmead Hospital, Australia (A.R.D., T.C.T.).