title: Henoch-Schönlein purpura.
mesh_terms: D006801:Humans; D011695:IgA Vasculitis / Q000276:immunology*; D007070:Immunoglobulin A / Q000032:analysis*; D007071:Immunoglobulin A, Secretory / Q000032:analysis*
chemical_list: D007070:Immunoglobulin A; D007071:Immunoglobulin A, Secretory