Haitham W Tuffaha1, Lazaros Andronis2, Paul A Scuffham3. 1. Centre for Applied Health Economics, Griffith University, Brisbane, QLD haitham.tuffaha@griffith.edu.au. 2. Institute of Applied Health Research, University of Birmingham, Birmingham, United Kingdom. 3. Menzies Health Institute Queensland, Griffith University, Gold Coast, QLD.