Helander, S.D. et al. 1995. Henoch-Schönlein purpura: clinicopathologic correlation of cutaneous vascular IgA deposits and the relationship to leukocytoclastic vasculitis. Acta Dermato-Venereologica. 75, 2 (Mar. 1995), 125–129. DOI:https://doi.org/10.2340/0001555575125129.