1. Division of Rheumatology, Department of Medicine Solna, Karolinska Institutet, 17176 Stockholm, Sweden
2. Department of Gastroenterology, Dermatology and Rheumatology, Karolinska University Hospital, 17176 Stockholm, Sweden
3. Department of Rheumatology, Faculty of Medicine and Health, Örebro University, 70182 Örebro, Sweden