RT Journal Article SR Electronic T1 The role of testing in the preoperative evaluation JF Cleveland Clinic Journal of Medicine JO Cleve Clin J Med FD Cleveland Clinic SP S22 OP S27 DO 10.3949/ccjm.76.s4.04 VO 76 IS 10 suppl 4 A1 Hepner, David L. YR 2009 UL http://www.ccjm.org/content/76/10_suppl_4/S22.abstract AB