1 Department of Cardiology, Westmead Hospital and University of Sydney, Sydney, NSW, Australia; Department of Cardiology, Blacktown Hospital, and Western Sydney University, Sydney, NSW, Australia. Electronic address: journal@csanz.edu.au.
2 Heart Research Group, Murdoch Children's Research Institute, Royal Children's Hospital, Melbourne, Vic, Australia; Department of Paediatrics, University of Melbourne, Melbourne, Vic, Australia. Electronic address: journal@csanz.edu.au.