1. Department of Clinical Medicine, Faculty of Medicine and Health Sciences; Macquarie University; Sydney New South Wales Australia
2. Faculty of Business and Economics; Macquarie University; Sydney New South Wales Australia
3. Centre for the Health Economy; Macquarie University; Sydney New South Wales Australia
4. Macquarie University Hospital; Macquarie University; Sydney New South Wales Australia
5. Mt Wilga Private Hospital; Hornsby New South Wales Australia
6. Australian Institute for Business and Economics, Faculty of Business, Economics and Law; University of Queensland; St Lucia Queensland Australia