1 Echo Lab, Clinica Montevergine, GVM Care and Research, Mercogliano, AV, Italy; Heart and Vascular Centre, Cardiovascular Research Institute, University of Maastricht, the Netherlands. Electronic address: francescomelillo1989@gmail.com.
2 Department of Cardiac Surgery, Anthea Hospital GVM Care and Research, Bari and San Carlo Nancy GVM Care and Research, Rome, Italy.