RT Journal Article SR Electronic T1 Economic Aspects of Preoperative Testing JF Cleveland Clinic Journal of Medicine JO Cleve Clin J Med FD Cleveland Clinic SP eS18 OP eS18 VO 77 IS 3 esuppl 1 A1 Fritsch, Gerhard A1 Flamm, Maria A1 Seer, Josef A1 Soennichsen, Andreas YR 2010 UL http://www.ccjm.org/content/77/3_esuppl_1/eS18.abstract AB