RT Book, Section A1 Ma, O. John A1 Mateer, James R. A1 Reardon, Robert F. A1 Byars, Donald V. A1 Knapp, Barry J. A1 Laudenbach, Andrew P. SR Print(0) ID 1175574316 T1 Foreword T2 Ma and Mateer's Emergency Ultrasound, 4e YR 2021 FD 2021 PB McGraw-Hill Education PP New York, NY SN 9781260441819 LK accessemergencymedicine.mhmedical.com/content.aspx?aid=1175574316 RD 2024/03/29 AB Over 200 years ago, Rene Laennec crafted a device to aid gathering information that would improve care; his device was the first stethoscope, allowing us to hear things in health and disease. While at first being crude in design and requiring much training, this tool now is one of the basic things used by many delivering health care. It allowed physicians and others to know more, early and safely.