1. Susan and Leonard Feinstein Inflammatory Bowel Disease Clinical Center, Icahn School of Medicine at Mount Sinai , New York, NY , USA
2. Bristol Myers Squibb , Princeton, NJ , USA
3. Center for Neurology , Lodz , Poland
4. Department of Neurology, Collegium Medicum, University of Warmia and Mazury , Olsztyn , Poland
5. Department of Neurorehabilitation Sciences, Vita-Salute San Raffaele University and Casa di Cura Igea , Milan , Italy
6. Department of Gastroenterology and Hepatology, Erasmus University Medical Center , Rotterdam , Netherlands
7. Gastroenterology Division, Department of Medicine, University of California, San Francisco , San Francisco, CA , USA