1 George Institute for Global Health, University of Oxford, Oxford, England.
2 Centre for Statistics in Medicine, Nuffield Department of Orthopaedics, Rheumatology, and Musculoskeletal Sciences, University of Oxford, Oxford, England3Faculty of Medicine, University of Toronto, Toronto, Ontario, Canada.
3 University of Oxford, Oxford, England.
4 Centre for Statistics in Medicine, Nuffield Department of Orthopaedics, Rheumatology, and Musculoskeletal Sciences, University of Oxford, Oxford, England5Centre d'Epidémiologie Clinique, Université Paris Descartes, INSERM U1153, Paris, France.
5 Centre for Statistics in Medicine, Nuffield Department of Orthopaedics, Rheumatology, and Musculoskeletal Sciences, University of Oxford, Oxford, England.