Usoltsev Nikolay A, Alfirevic Andrej, Trombetta Carlos
From the *Department of Anesthesiology, Marshfield Clinic, Marshfield, Wisconsin; and †Department of Cardiothoracic Anesthesiology, Cleveland Clinic, Cleveland, Ohio.
Anesth Analg. 2013 Dec;117(6):1279-81. doi: 10.1213/ANE.0b013e3182a4e453.