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Departmrnt of Rheumatology, Ghent University, Gent, Belgium Correspondence to Professor Dr Filip De Keyser, Department of Rheumatology, Gent University Hospital, De Pintelaan 185, B-9000 Gent, Belgium Tel: +32 9 240 22 30; fax: +32 9 240 38 03; e-mail: email protected
Filip De Keyser (Mon,) studied this question.