1. Department of Laboratory Medicine Institute of Biomedicine, The Sahlgrenska Academy at the University of Gothenburg Gothenburg
2. Neuromuscular Center, Department of Neurology Sahlgrenska University Hospital Gothenburg
3. Department of Rheumatology and Inflammation Research Institute of Medicine, The Sahlgrenska Academy at the University of Gothenburg Gothenburg Sweden
4. Department of Clinical Immunology and Transfusion Medicine Sahlgrenska University Hospital Gothenburg Sweden