1 Department of Occupational and Environmental Medicine, Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, and Sahlgrenska University Hospital, Gothenburg, Sweden.
2 Department of Occupational and Environmental Medicine, Skåne University Hospital, Lund, Sweden.
3 Departments of Orthopedics and Clinical Sciences, Lund University, Skåne University Hospital, Malmö, Sweden.
4 Centre for Bone and Arthritis Research (CBAR), Department of Internal Medicine, Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden.
5 Department of Geriatric Medicine, Internal Medicine, Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden.