title: Cutaneous vasculitis: what have we learned in the past 20 years?
authors.forename: J P
authors.initials: JP
authors.lastname: Callen
mesh_terms: D006801:Humans; D011379:Prognosis; D012867:Skin / Q000473:pathology; D018366:Vasculitis, Leukocytoclastic, Cutaneous / Q000150:complications / Q000175:diagnosis / Q000473:pathology / Q000628:therapy