a Department of Diagnostic Radiology, University Hospital Freiburg, Freiburg, Germany
b Department of Cardiovascular Surgery, University Hospital Freiburg, Freiburg, Germany
* Corresponding author. Department of Diagnostic Radiology, University Hospital Freiburg, Hugstetter Str. 55, 79104 Freiburg, Germany. Tel: +49-761-27038060; fax: +49-761-27038380; e-mail: [email protected] (P. Blanke).
Received February 20, 2012; accepted February 25, 2012
