The impact of sex and disease classification on patient-reported outcome measures in axial spondyloarthritis: a descriptive prospective cross-sectional study oleh Rikke A. Andreasen, Lars E. Kristensen, Kenneth Egstrup, Xenofon Baraliakos, Vibeke Strand, Hans Christian Horn, Inger M. J. Hansen, Robin Christensen, Torkell Ellingsen