1. 1Cancer Council Queensland, Brisbane, Queensland, Australia.
2. 2Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden.
3. 3School of Public Health, Faculty of Medicine, University of Queensland, Brisbane, Queensland, Australia.
4. 4School of Mathematical Sciences, Queensland University of Technology, Brisbane, Queensland, Australia.
5. 5Menzies Health Institute, Griffith University, Southport, Queensland, Australia.