RT Journal Article SR Electronic T1 Hypocomplementemic Urticarial Vasculitis in a Patient with Chronic Obstructive Pulmonary Disease and Pulmonary Silicosis JF Cleveland Clinic Journal of Medicine JO Cleve Clin J Med FD Cleveland Clinic SP 543 OP 544 VO 56 IS 5 A1 C. Vaughn Strimlan A1 Joseph Liput A1 Michael Stevens YR 1989 UL http://www.ccjm.org/content/56/5/543.abstract AB