title: Falling through the cracks of vasculitis classification-a report of three patients.
authors.affiliation: Division of Nephrology, Department of Medicine, Johns Hopkins Bayview Medical Center, Baltimore, MD, USA.
authors.forename: John P
authors.initials: JP
authors.lastname: Havill
authors.affiliation: Division of Rheumatology, Department of Medicine, Johns Hopkins Bayview Medical Center, Baltimore, MD, USA.
authors.forename: Stuart M
authors.initials: SM
authors.lastname: Levine
authors.affiliation: Department of Pathology, Johns Hopkins Medical Institutions, Baltimore, MD, USA.
authors.forename: Michael
authors.initials: M
authors.lastname: Kuperman
authors.affiliation: Division of Rheumatology, Department of Medicine, Johns Hopkins Bayview Medical Center, Baltimore, MD, USA.
authors.forename: David B
authors.initials: DB
authors.lastname: Hellmann
authors.affiliation: Division of Nephrology, Department of Medicine, Johns Hopkins Bayview Medical Center, Baltimore, MD, USA.
authors.forename: Duvuru
authors.initials: D
authors.lastname: Geetha
keywords: ANCA vasculitis; IgA vasculitis; Takayasu’s arteritis; vasculitis overlap syndromes