1. Klinikum Bielefeld, Universitätsklinik für Innere Medizin und Rheumatologie, An der Rosenhöhe 27, 33647 Bielefeld, Germany
2. Centre for Rheumatology & Department of Neuromuscular Diseases, University College London, London, UK
3. Department of Rheumatology, Northwick Park Hospital, London North West University Healthcare NHS Trust, London, UK
4. UCB Pharma, Colombes, France
5. UCB Pharma, Brussels, Belgium
6. UCB Pharma, Monheim, Germany
7. Department of Medicine/Rheumatology, University of California San Francisco, San Francisco, CA, USA