RT Journal Article SR Electronic T1 Differential Diagnosis of Hypersensitivity Vasculitis JF Cleveland Clinic Journal of Medicine JO Cleve Clin J Med FD Cleveland Clinic SP 506 OP 507 VO 57 IS 6 A1 Calabrese, Leonard H. YR 1990 UL http://www.ccjm.org/content/57/6/506.abstract AB