The cost of care of systemic lupus erythematosus (SLE) in the UK: annual direct costs for adult SLE patients with active autoantibody-positive disease. - Khamashta, MA; Bruce, IN; Gordon, C; Isenberg, DA; Ateka-Barrutia, O; Gayed, M; Donatti, C; Guillermin, A-L; Foo, J; Perna, A (Lupus, 2014)