1 Rheumatology Unit, Royal Adelaide Hospital, Australia; Discipline of Medicine, University of Adelaide, Adelaide, South Australia, Australia. Electronic address: susanna.proudman@sa.gov.au.
2 Department of Rheumatology, St Vincent's Hospital, Australia; Department of Medicine, The University of Melbourne at St. Vincent's Hospital, Melbourne, Victoria, Australia.
3 Department of Medicine, McGill University, Division of Rheumatology and Lady Davis Institute, Jewish General Hospital, Montréal, Quebec, Canada.