RT Book, Section A1 Freeman, Brian S. A1 Berger, Jeffrey S. SR Print(0) ID 1204766990 T1 ASA Preoperative Laboratory Testing Guidelines T2 Anesthesiology Core Review: Part One: BASIC Exam, 2nd Edition YR 2024 FD 2024 PB McGraw-Hill Education PP New York, NY SN 9781264285518 LK accessanesthesiology.mhmedical.com/content.aspx?aid=1204766990 RD 2024/11/09 AB Practice advisories are not concrete guidelines, but rather a source to assist in clinical decision-making. Although supported by scientific evidence, the same rigor is not applied to these advisories as would be to standards or guidelines due to insufficient number of adequately controlled studies.