1. Department of Laboratory Medicine , OLV Hospital , Aalst , Belgium
2. Department of Laboratory Medicine , University Hospital Leuven , Leuven , Belgium
3. Department of Gastroenterology , OLV Hospital , Aalst , Belgium
4. Headquarters & Technology Center Autoimmunity, Werfen , San Diego , CA , USA
5. Thermo Fisher Scientific , Freiburg , Germany
6. Department of Microbiology, Immunology and Transplantation , KU Leuven , Leuven , Belgium