1. Department of Medical and Surgical Sciences; University of Bologna, and St. Orsola-Malpighi Hospital; Bologna Italy
2. Department of Veterinary Medical Sciences; University of Bologna; Bologna Italy
3. Neurology Unit; St. Orsola-Malpighi Hospital; Bologna Italy
4. Department of Neural and Behavioral Sciences; Penn State College of Medicine; Hershey PA USA
5. CURE Digestive Diseases Research Center; Digestive Diseases Division; Departments of Medicine and Neurobiology; University of California Los Angeles; David Geffen School of Medicine; Los Angeles CA USA
6. Centro Unificato di Ricerca Biomedica Applicata; Bologna Italy