Patient-reported outcome measures in systemic lupus erythematosus by a web-based application: a randomised, crossover, agreement study by Uhrenholt, L, Høstgaard, S, Pedersen, JF, Christensen, R, Dreyer, L, Leffers, HCB, Taylor, PC, Strand, V, Jacobsen, S, Voss, A, Gregersen, JW, Kristensen, S