1 Division of Cardiology, Department of Biomedical, Metabolic and Neural Sciences, University of Modena and Reggio Emilia, Policlinico di Modena, Modena, Italy.
2 Clinical Cardiovascular Research Center, University of Rochester Medical Center, 265 Crittenden Blvd., Box 653, Rochester, NY, USA.
3 Department of Cardiology, Heart Center, Semmelweis University, Budapest, Hungary.