1 Institute of Life Sciences, Scuola Superiore Sant'Anna, Division of Cardiology and Cardiovascular Medicine, Fondazione Toscana Gabriele Monasterio, Pisa, Italy. Electronic address: vergaro@ftgm.it.
2 Institute of Life Sciences, Scuola Superiore Sant'Anna, Division of Cardiology and Cardiovascular Medicine, Fondazione Toscana Gabriele Monasterio, Pisa, Italy.
3 Heart Failure Clinic, Health Sciences Research Institute, Hospital Universitari Germans Trias i Pujol, Badalona, Spain; Department of Medicine, Universitat Autonoma de Barcelona, Barcelona, Spain; CIBERCV, Instituto de Salud Carlos III, Madrid, Spain.