1. Division of Immunology, Transplantation and Infectious Diseases, IRCCS (Istituto di Ricerca e Cura a carattere Scientifico) San Raffaele Scientific Institute, 20132 Milan, Italy.
2. Vita-Salute San Raffaele University, 20132 Milan, Italy
3. Clinical Neurology Unit, IRCCS San Raffaele Scientific Institute, 20132 Milan, Italy.
4. Microbiology Unit, IRCCS San Raffaele Scientific Institute, 20132 Milan, Italy.
5. Gastroenterology Unit, IRCCS San Raffaele Scientific Institute, 20132 Milan, Italy.
6. Department of Biotechnology and Life Sciences, University of Insubria, Varese, Italy.