1. Melbourne School of Health Sciences, Faculty of Medicine, Dentistry and Health Sciences, The University of Melbourne, Alan Gilbert Building, 161 Barry Street, Carlton, VIC 3053, Australia
2. Department of Epidemiology & Preventive Medicine, Faculty of Medicine, Nursing and Health Sciences, Monash University, The Alfred Campus, Melbourne, VIC 3004, Australia
3. School of Nursing and Midwifery, Monash University, Clayton Campus, Clayton, VIC 3168, Australia
4. The Melbourne EpiCentre (Collaborative Centre for Clinical Epidemiology, Biostatistics and Health Services Research), c/- The Royal Melbourne Hospital, 7 East, Main Building, Grattan Street, Parkville, VIC 3050, Australia
5. School of Nursing and Midwifery, Deakin University, 221 Burwood Highway, Burwood, VIC 3125, Australia
6. Department of Medicine, The Royal Melbourne Hospital, The University of Melbourne, Royal Parade, Parkville, VIC 3052, Australia