RT Journal Article SR Electronic T1 Ultrasonography in the diagnosis of obstructive uropathy caused by papillary necrosis JF Cleveland Clinic Journal of Medicine JO Cleve Clin J Med FD Cleveland Clinic SP 109 OP 114 VO 47 IS 2 A1 Buonocore, Edward A1 Vidt, Donald G. A1 Montie, James E. YR 1980 UL http://www.ccjm.org/content/47/2/109.abstract AB