RT Journal Article SR Electronic T1 Diagnosis and Treatment of Aortic Rings JF Cleveland Clinic Journal of Medicine JO Cleve Clin J Med FD Cleveland Clinic SP 310 OP 324 VO 18 IS 4 A1 Sones, F. Mason A1 Effler, Donald B. YR 1951 UL http://www.ccjm.org/content/18/4/310.abstract AB