GRAPPA-OMERACT initiative to standardise outcomes in psoriatic arthritis clinical trials and longitudinal observational studies

Affiliations

• ¹ Royal National Hospital for Rheumatic Disease, Bath, UK.
• ² Pharmacy and Pharmacology, University of Bath, Bath, UK.
• ³ Department of Medicine/Rheumatology, Johns Hopkins University, Baltimore, Maryland, USA.
• ⁴ Division of Rheumatology and Center for Clinical Epidemiology and Biostatistics, University of Pennsylvania, Philadelphia, Pennsylvania, USA.
• ⁵ Department of Rheumatology and Immunology, Singapore General Hospital, Singapore, Singapore.
• ⁶ Department of Immunology/Rheumatology, Stanford University, Stanford, California, USA.
• ⁷ Krembil Research Institute, University Health Network,Toronto Western Hospital, Toronto, Ontario, Canada.
• ⁸ Department of Rheumatology Research, Swedish Medical Center, Seattle, Washington, USA.
• ⁹ Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Oxford, UK.