RT Journal Article SR Electronic T1 When does chest CT require contrast enhancement? JF Cleveland Clinic Journal of Medicine JO Cleve Clin J Med FD Cleveland Clinic SP 423 OP 426 DO 10.3949/ccjm.83a.15037 VO 83 IS 6 A1 Camila Piza Purysko A1 Rahul Renapurkar A1 Michael A. Bolen YR 2016 UL http://www.ccjm.org/content/83/6/423.abstract AB