Affiliation: | 1. Rheumatology, Ghent University Hospital, Belgium 2. Rheumatology, Cliniques Universitaires Saint-Luc, Brussels, Belgium 3. Rheumatology, University Hospitals KULeuven, Leuven, Belgium 4. Medical affaires, Schering Plough, Brussels, Belgium 5. Medical affaires, Centocor, Leiden, the Netherlands
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