1 Department of Cardiology, Hôpital Européen Georges Pompidou, Assistance Publique Hôpitaux de Paris, Université Paris Descartes and Sudden Death Expert Center, INSERM U 970, Paris, France.
2 Department of Cardiology, Institution of Medical Science, Uppsala University, Uppsala, Sweden.
3 Department of Molecular Medicine, University of Pavia, Cardiology & Molecular Cardiology, IRCCS Fondazione Salvatore Maugeri, Pavia, Italy silvia.priori@fsm.it.