1. Department of Medicine, Unit of Medical Statistics and Moelcular Epidemiology University Campus Bio‐Medico of Rome Rome Italy
2. Department GEPLI Libera Università Maria SS Assunta Rome Italy
3. Department of Mathematics University of Bergen Bergen Norway
4. Department of Public Health and Infectious Diseases Sapienza University of Rome Rome Italy
5. Department of Medicine Azienda Ospedaliero‐Universitaria Policlinico Umberto I Rome Italy
6. Laboratory of Biostatistics and Computational Epidemiology, Department of Biosciences University of Molise Campobasso Italy
7. Department of Medicine, Unit of Gastroenterology University Campus Bio‐Medico of Rome Rome Italy
8. Department of Medicine, Unit of Clinical Laboratory Science University Campus Bio‐Medico of Rome Rome Italy