Occupational physical workload and development of anti-collagen type II antibodies in rheumatoid arthritis: results from the Swedish EIRA population-based case-control study
1 Institute of Environmental Medicine, Karolinska Institute, Stockholm, Sweden.
2 Department of Immunology, Genetics and Pathology, Uppsala University, Uppsala, Sweden.
3 Institute of Environmental Medicine, Karolinska Institute, Stockholm, and Rheumatology Unit, Department of Medicine Solna, Karolinska University Hospital, Karolinska Institute, Stockholm, Sweden.
4 Rheumatology Unit, Department of Medicine Solna, Karolinska University Hospital, Karolinska Institute, Stockholm, Sweden.
5 Institute of Environmental Medicine, Karolinska Institute, Stockholm, and Centre for Occupational and Environmental Medicine, Stockholm County Council, Stockholm, Sweden.
6 Department of Immunology, Genetics and Pathology, Uppsala University, Uppsala, Sweden. johan.ronnelid@igp.uu.se.