1. Department of Medicine, Division of Emergency Medicine; McMaster University; Hamilton Canada
2. Institute for the History and Philosophy of Science and Technology; University of Toronto; Toronto Canada
3. African Centre for Epistemology and Philosophy of Science; University of Johannesburg; Auckland Park South Africa
4. Centre for Health Economics and Policy Analysis, Department of Health Research Methods, Evaluation and Impact (formerly, Clinical Epidemiology and Biostatistics); McMaster University; Hamilton Canada