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 |