1. Department of Rheumatology, University Hospital Basel, Basel
2. Division of Rheumatology, Department of Internal Medicine, Kantonsspital St Gallen, St Gallen
3. Department of Rheumatology, Triemli Hospital, Zurich
4. Department of Rheumatology, Klinik St Katharinental, Diessenhofen
5. AbbVie AG, Baar, Switzerland