1. Department of Surgical, Medical, Dental and Morphological Sciences, University of Modena and Reggio Emilia, Modena, Italy
2. University of Modena and Reggio Emilia, Modena, Italy
3. Respiratory Unit, Azienda Ospedaliero-Universitaria, Policlinico of Modena, Modena, Italy
4. Department of Infectious Diseases, Azienda Ospedaliero-Universitaria, Policlinico of Modena, Modena, Italy
5. Division of Experimental Medicine, McGill University, Montreal, Québec, Canada
6. Division of Gastroenterology and Hepatology, McGill University Health Centre, Montreal, Québec, Canada
7. Department of Internal Medicine, Azienda Ospedaliero-Universitaria, Ospedale Civile di Baggiovara, Modena, Italy
8. Department of Medicine, University of Alberta, Edmonton, Alberta, Canada