Haller Christoph, Sarai Koppany, Siepe Matthias, Beyersdorf Friedhelm
Department of Cardiovascular Surgery, University Medical Center, Freiburg, Germany.
J Thorac Cardiovasc Surg. 2010 Nov;140(5):e75-6. doi: 10.1016/j.jtcvs.2010.06.029. Epub 2010 Jul 14.