RT Journal Article SR Electronic T1 Aspiration and cytology in the evaluation of renal mass lesions JF Cleveland Clinic Journal of Medicine JO Cleve Clin J Med FD Cleveland Clinic SP 1 OP 6 VO 43 IS 1 A1 Stewart, Bruce H. A1 Pasalis, John K. YR 1976 UL http://www.ccjm.org/content/43/1/1.abstract AB