1. Biostatisitcs Unit at Bellvitge Biomedical Research Institute (IDIBELL); L'Hospitalet de Llobregat; Spain
2. Department of Basic Medical Sciences; Universitat de Barcelona; Barcelona Spain
3. Department of Basic Medical Sciences; Universitat Rovira i Virgili; Reus Spain
4. Grup de Recerca en Malalties Prevalents de l'Aparell Locomotor (GREMPAL) Research Group and CIBERFes; University Institute for Primary Care Research (IDIAP) Jordi Gol; Universitat Autonoma de Barcelona and Instituto de Salud Carlos III; Barcelona Spain
5. Ambit Barcelona; Primary Care Department; Institut Catala de la Salut; Barcelona Spain
6. Unit of Biomarkers and Susceptibility, Cancer Prevention and Control Program, Catalan Institute of Oncology (ICO), IDIBELL; L'Hospitalet de Llobregat; Spain
7. Consortium for Biomedical Research in Epidemiology & Public Health, CIBERESP; Madrid Spain
8. Oxford NIHR Biomedical Research Centre; University of Oxford; Oxford UK
9. Medical Research Council (MRC) Lifecourse Epidemiology Unit; University of Southampton; UK
10. Musculoskeletal Research Unit; IMIM-Hospital del Mar and CIBERFes; Universitat Autònoma de Barcelona and Instituto de Salud Carlos III; Barcelona Spain
11. Centre for Statistics in Medicine (CSM); Nuffield Department of Orthopaedics; Rheumatology, and Musculoskeletal Sciences (NDORMS); University of Oxford; Oxford UK