1. Menzies Centre for Health Policy, School of Public Health, University of Sydney, Sydney, Australia;
2. Sydney Hospital and Sydney Eye Hospital, Sydney, Australia;
3. New South Wales Poisons Information Centre, The Children's Hospital at Westmead, Sydney, Australia;
4. Sydney Medical School, University of Sydney, Sydney, Australia;
5. Medicines Policy Research Unit, Centre for Big Data Research in Health, University of New South Wales, Sydney, Australia