1 Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Oxford, UK; National Institute for Health and Care Research Oxford Biomedical Research Center, Oxford, UK; Value in Health Regional Issues, Lawrenceville, NJ, USA. Electronic address: [email protected].
2 Value in Health Regional Issues, Lawrenceville, NJ, USA; Department of Public Health, Pontificia Universidad Católica de Chile, Santiago, Chile.