Roberts William Clifford, Velasco Carlos Ernesto, Ko Jong Mi, Matter Gregory John
Department of Internal Medicine, Division of Cardiology, Baylor University Medical Center, Dallas, TX 75246, USA.
J Thorac Cardiovasc Surg. 2009 Dec;138(6):1448-50. doi: 10.1016/j.jtcvs.2009.02.022. Epub 2009 Mar 26.