1 Rheumatology, University Hospitals Leuven, Leuven, Belgium.
2 European Reference Network on Rare and Complex Connective Tissue and Musculoskeletal Diseases (ERN ReCONNET); European Reference Network on Rare Immunodeficiency, Autoinflammatory and Autoimmune Diseases (ERN RITA), Leuven, Belgium.
3 Department of Microbiology, Immunology and Transplantation, Clinical and Diagnostic Immunology, KU Leuven, Leuven, Belgium.
4 Department of Development and Regeneration, Skeletal Biology and Engineering Research Center, KU Leuven, Leuven, Belgium.
5 Dermatology, University Hospitals Leuven, Leuven, Belgium.
6 Department of Microbiology, Immunology and Transplantation, KU Leuven, Leuven, Belgium.