- Correspondence to Professor Patrizio Lancellotti, Domaine Universitaire du Sart Tilman, Batiment B35 Department of Cardiology, University Hospital, Université de Liège, CHU du Sart Tilman 4000 Liège, Belgium;
- Received 6 September 2017
- Revised 30 October 2017
- Accepted 15 November 2017
- Published online 7 December 2017.
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