1. Department of Biomedicine and Prevention; University of Rome Tor Vergata; Rome Italy
2. Department of Medicine and Surgery; University of Milano-Bicocca; Milan Italy
3. Centre of Biostatistics for Clinical Epidemiology; Department of Medicine and Surgery; University of Milano-Bicocca; Milan Italy
4. Sapienza University; Bracciano Rome Italy
5. Department of Cardiology; Policlinico Federico II; Naples Italy