1 New South Wales Public Health Officer Training Program, New South Wales Ministry of Health, Australia . ; School of Public Health and Community Medicine, University of New South Wales, Australia .
2 Population Health, Hunter New England Local Health District, New South Wales, Australia .
3 Communicable Diseases Branch, Health Protection, New South Wales Ministry of Health, North Sydney, Australia .
4 New South Wales Refugee Health Service, Sydney, Australia .
5 Population Health, Hunter New England Local Health District, New South Wales, Australia . ; Hunter Medical Research Institute, Newcastle, New South Wales, Australia .