TY - CHAP M1 - Book, Section TI - Foreword A1 - Ma, O. John A1 - Mateer, James R. A1 - Reardon, Robert F. A1 - Byars, Donald V. A1 - Knapp, Barry J. A1 - Laudenbach, Andrew P. PY - 2021 T2 - Ma and Mateer's Emergency Ultrasound, 4e 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. SN - PB - McGraw-Hill Education CY - New York, NY Y2 - 2024/03/29 UR - accessemergencymedicine.mhmedical.com/content.aspx?aid=1175574316 ER -