RT Journal Article SR Electronic T1 Three Safety Devices for the Heart-Lung Machine JF Cleveland Clinic Journal of Medicine JO Cleve Clin J Med FD Cleveland Clinic SP 169 OP 176 VO 25 IS 3 A1 Olmsted, Frederick A1 Kolff, Willem J. A1 Effler, Donald B. YR 1958 UL http://www.ccjm.org/content/25/3/169.abstract AB