1. Department of Surgery and Nutrition, Ipswich Hospital, Ipswich, Queensland, Australia
2. Department of Mathematics and Computing, Australian Centre for Sustainable Catchments, University of Southern Queensland, Toowoomba, Queensland, Australia
3. Institute of Mathematical Sciences, University of Malaya, Kuala Lumpur, Malaysia
4. Mayne Medical School, School of Medicine, University of Queensland, Brisbane, Queensland, Australia
5. Faculty of Health Sciences and Medicine, Bond University, Gold Coast, Queensland, Australia
6. Faculty of Health Sciences, Bolton University, Bolton, Lancashire, United Kingdom