1 Department of Immunology-Allergology-Rheumatology, University of Antwerp and Antwerp University Hospital, Antwerp, Belgium.
2 Department of Immunology-Allergology-Rheumatology, University of Antwerp and Antwerp University Hospital, Antwerp, Belgium; Department of Immunology-Allergology, AZ Jan Palfijn Gent, Ghent, Belgium.
3 Department of Abdominal Surgery, University of Antwerp and Antwerp University Hospital, Antwerp, Belgium.
4 Department of Immunology-Allergology-Rheumatology, University of Antwerp and Antwerp University Hospital, Antwerp, Belgium; Department of Immunology-Allergology, AZ Jan Palfijn Gent, Ghent, Belgium. Electronic address: immuno@uantwerpen.be.