Siepe Matthias, Rylski Bartosz, Kari Fabian Alexander, Beyersdorf Friedhelm
Department of Cardiovascular Surgery, University Heart Centre Freiburg-Bad Krozingen, Freiburg, Germany.
Interact Cardiovasc Thorac Surg. 2014 Nov;19(5):884-5. doi: 10.1093/icvts/ivu245.