title: Vasculitis in children with acute urticaria.
mesh_terms: D000208:Acute Disease; D000293:Adolescent; D000936:Antigen-Antibody Complex; D002648:Child; D002675:Child, Preschool; D006801:Humans; D007105:Immune Complex Diseases / Q000150:complications; D014581:Urticaria / Q000150:complications*; D018366:Vasculitis, Leukocytoclastic, Cutaneous / Q000150:complications*
chemical_list: D000936:Antigen-Antibody Complex