1 Institute of Clinical Medicine, University of Oslo, Oslo, Norway; Department of Research, Innovation and Education, Division of Clinical Neuroscience, Oslo University Hospital, Oslo, Norway; K. G. Jebsen Center for Genetic Epidemiology, Department of Public Health and Nursing, Faculty of Medicine and Health, Norwegian University of Science and Technology, Trondheim, Norway. Electronic address: m.b.johnsen@medisin.uio.no.
2 Lund University, Faculty of Medicine, Department of Clinical Sciences, Lund, Sweden; Orthopaedics, Clinical Epidemiology Unit, Lund, Sweden; National Advisory Unit on Rehabilitation in Rheumatology, Department of Rheumatology, Diakonhjemmet Hospital, Oslo, Norway. Electronic address: mangusson_karin@outlook.com.
3 Institute of Clinical Medicine, University of Oslo, Oslo, Norway; Department of Research, Innovation and Education, Division of Clinical Neuroscience, Oslo University Hospital, Oslo, Norway; K. G. Jebsen Center for Genetic Epidemiology, Department of Public Health and Nursing, Faculty of Medicine and Health, Norwegian University of Science and Technology, Trondheim, Norway. Electronic address: sigrid.borte@gmail.com.
4 K. G. Jebsen Center for Genetic Epidemiology, Department of Public Health and Nursing, Faculty of Medicine and Health, Norwegian University of Science and Technology, Trondheim, Norway. Electronic address: maiken.e.gabrielsen@ntnu.no.
5 Department of Research, Innovation and Education, Division of Clinical Neuroscience, Oslo University Hospital, Oslo, Norway; K. G. Jebsen Center for Genetic Epidemiology, Department of Public Health and Nursing, Faculty of Medicine and Health, Norwegian University of Science and Technology, Trondheim, Norway. Electronic address: bendik.s.winsvold@gmail.com.
6 K. G. Jebsen Center for Genetic Epidemiology, Department of Public Health and Nursing, Faculty of Medicine and Health, Norwegian University of Science and Technology, Trondheim, Norway. Electronic address: anne.heidi.skogholt@ntnu.no.
7 K. G. Jebsen Center for Genetic Epidemiology, Department of Public Health and Nursing, Faculty of Medicine and Health, Norwegian University of Science and Technology, Trondheim, Norway; Department of Clinical and Molecular Medicine, Norwegian University of Science and Technology, Trondheim, Norway. Electronic address: laurent.thomas@ntnu.no.
8 Research and Communication Unit for Musculoskeletal Health, Oslo University Hospital, Oslo, Norway. Electronic address: kjersti.storheim@medisin.uio.no.
9 K. G. Jebsen Center for Genetic Epidemiology, Department of Public Health and Nursing, Faculty of Medicine and Health, Norwegian University of Science and Technology, Trondheim, Norway. Electronic address: kristian.hveem@ntnu.no.
10 Institute of Clinical Medicine, University of Oslo, Oslo, Norway; Department of Research, Innovation and Education, Division of Clinical Neuroscience, Oslo University Hospital, Oslo, Norway; K. G. Jebsen Center for Genetic Epidemiology, Department of Public Health and Nursing, Faculty of Medicine and Health, Norwegian University of Science and Technology, Trondheim, Norway. Electronic address: j.a.zwart@medisin.uio.no.