1 UK EQUATOR Centre, Centre for Statistics in Medicine (CSM), NDORMS (Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Diseases), University of Oxford, Oxford, UK patricia.logullo@ndorms.ox.ac.uk.
2 Oxford-Brazil EBM Alliance, Oxford, UK.
3 UK EQUATOR Centre, Centre for Statistics in Medicine (CSM), NDORMS (Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Diseases), University of Oxford, Oxford, UK.