Affiliation: | 1. Adult Retrieval Victoria, Ambulance Victoria, , Melbourne, Victoria, Australia;2. Department of Epidemiology and Preventive Medicine, Monash University, , Melbourne, Victoria, Australia;3. Centre for Outcome and Resource Evaluation, Australia and New Zealand Intensive Care Society, , Melbourne, Victoria, Australia;4. Victoria Data Linkage, Victorian Department of Health, , Melbourne, Victoria, Australia |