Evans David, Ferraioli Giovanna, Snellings John, Levitov Alexander
Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Eastern Virginia Medical School, 825 Fairfax Ave, Suite 410, Norfolk, VA 23507 USA.
J Ultrasound Med. 2014 Jan;33(1):3-7. doi: 10.7863/ultra.33.1.3.