1. Department of Laboratory Medicine, Sahlgrenska Academy University of Gothenburg Gothenburg Sweden
2. Proteomics Core Facility, Sahlgrenska Academy University of Gothenburg Gothenburg Sweden
3. Department of Biomolecular Medicine, Center for Medical Genetics Ghent University Hospital Ghent Belgium
4. Centre de Rheumatologie Liège Belgium
5. Laboratory of Clinical Chemistry Sahlgrenska University Hospital Gothenburg Sweden