1. Department of Orthopaedic Surgery; University of Michigan; Ann Arbor MI USA
2. Department of Epidemiology; School of Public Health; University of Michigan; Ann Arbor MI USA
3. Institute for Applied Epistemology and Medical Methodology; University of Witten/Herdecke; Freiburg Germany
4. Centre for Statistics in Medicine; University of Oxford; Oxford UK
5. Ottawa Hospital Research Institute; Department of Epidemiology and Community Medicine; University of Ottawa; Ottawa ON Canada
6. The Dartmouth Institute and Geisel School of Medicine at Dartmouth; Hanover New Hampshire UK
7. Global Advances in Health and Medicine; Portland OR USA