- Correspondence to Dr Sergio Berti, Fondazione Toscana Gabriele Monasterio—Ospedale del Cuore G. Pasquinucci, Via Aurelia Sud, Massa 54100, Italy;
- Received December 10, 2015
- Revised June 10, 2016
- Accepted June 21, 2016
- First published August 4, 2016.
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