- Correspondence to Professor Giovanni Battista Luciani, Division of Cardiac Surgery, Department of Surgery, University of Verona, O. C. M. Piazzale Stefani 1, Verona 37126, Italy;
- Received March 17, 2014
- Revised June 27, 2014
- Accepted July 1, 2014
- First published July 23, 2014.
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