RT Journal Article SR Electronic T1 Chronic Urticaria and Angioneurotic Edema JF Cleveland Clinic Journal of Medicine JO Cleve Clin J Med FD Cleveland Clinic SP 229 OP 233 VO 17 IS 4 A1 J. R. Evans A1 C. R. K. Johnston YR 1950 UL http://www.ccjm.org/content/17/4/229.abstract AB