1. Respiratory Division, The George Institute for Global Health, Newtown, New South Wales, Australia
2. School of Medical Sciences, Faculty of Medicine, The University of New South Wales, Kensington, New South Wales, Australia
3. Mental Health Division, The George Institute for Global Health, Newtown, New South Wales, Australia
4. Statistics Division, The George Institute for Global Health, Newtown, New South Wales, Australia
5. Concord Clinical School, Medical Education Centre, Concord Repatriation General Hospital, Kensington, Concord, New South Wales, Australia