Johanna I Westbrook1
, Jeffrey Braithwaite2
, Kathryn Gibson3
, Richard Paoloni4
, Joanne Callen1
, Andrew Georgiou1
, Nerida Creswick1
and Louise Robertson5 
1Health Informatics Research & Evaluation Unit, Faculty of Health Sciences, The University of Sydney, 75 East St, Lidcombe, NSW 1825, Australia
2Centre for Clinical Governance Research, Australian Institute of Health Innovation, Faculty of Medicine, University of New South Wales, 10 Arthur St, Kensington, NSW 2052, Australia
3Rheumatology Department, Liverpool Hospital, Locked Bag 7103, Liverpool BC, NSW 1871, Australia
4Emergency Department, Concord Hospital, Hospital Rd, Concord, NSW 2139, Australia
5Information Services Department, Royal Prince Alfred Hospital, Camperdown, NSW 2040, Australia