Guarracino F, Benussi S, Triggiani M, Oppizzi M, Donatelli F, Grossi A
Institute for Cardiovascular and Respiratory Diseases, University of Milan, H. San Roffaele, Italy.
J Cardiothorac Vasc Anesth. 1997 Feb;11(1):89-90. doi: 10.1016/s1053-0770(97)90261-5.