Seyger, M. et al. 1998. Decreased Staining of Heparan Sulfate in Non-Lesional Skin of a Subgroup of Patients with Systemic Lupus Erythematosus. Acta Dermato-Venereologica. 78, 5 (Oct. 1998), 326–330. DOI:https://doi.org/10.1080/000155598442971.