title: Drs. Maharaj and Chandran reply.
authors.affiliation: Department of Clinical Immunology and Rheumatology, Academic Medical center, University of Amsterdam, Amsterdam, the Netherlands; maharaja30@ukzn.ac.za.
authors.forename: Ajesh B
authors.initials: AB
authors.lastname: Maharaj
authors.affiliation: Department of Medicine, Division of Rheumatology, University of Toronto, and Centre for Prognosis Studies in the Rheumatic Diseases, Toronto Western Hospital, Toronto, Ontario, Canada.
authors.forename: Vinod
authors.initials: V
authors.lastname: Chandran
mesh_terms: D015535:Arthritis, Psoriatic / Q000503:physiopathology*; D004551:Elbow Joint / Q000002:abnormalities* / Q000503:physiopathology*; D005260:Female; D006801:Humans; D007592:Joint Diseases / Q000151:congenital* / Q000000981:diagnostic imaging*; D011859:Radiography; D016059:Range of Motion, Articular / Q000502:physiology*