1 National Centre for Epidemiology and Public Health, Australian National University, Canberra, Australian Capital Territory, Australia raglan.maddox@anu.edu.au.
2 Center for Tobacco Control Research and Education, School of Medicine, University of California San Francisco, San Francisco, California, USA.
3 Well Living House, St. Michael's Hospital, Unity Health Toronto, Toronto, Ontario, Canada.
4 Health Sciences, Curtin University, Perth, Western Australia, Australia.