Affiliation: | (1) Rheumatic Diseases Centre, Hope Hospital, Stott Lane, Salford, M6 8HD, UK;(2) Department of Medicine, Trafford General Hospital, Moorside Rd., Davyhulme,Manchester M41 5SL, UK;(3) Department of Neurology, Manchester Royal Infirmary, Oxford Rd., Manchester, M13 9WL, UK |