RT Journal Article SR Electronic T1 When is contrast needed for abdominal and pelvic CT? JF Cleveland Clinic Journal of Medicine JO Cleve Clin J Med FD Cleveland Clinic SP 595 OP 598 DO 10.3949/ccjm.87a.19093 VO 87 IS 10 A1 Mark Radetic A1 Robert DeVita A1 John Haaga YR 2020 UL http://www.ccjm.org/content/87/10/595.abstract AB