Bettex Dominique A, Vogt Paul R, Jenni Rolf, Schmid Edith R
Division of Cardiovascular Anesthesia, Institute of Anesthesiology, and Division of Echocardiography, Department of Internal Medicine, University Hospital of Zürich, Zürich, Switzerland.
J Cardiothorac Vasc Anesth. 2002 Feb;16(1):80-2. doi: 10.1053/jcan.2002.29688.