1. Department of Rheumatology, Leiden University Medical Center, Leiden University, Leiden, The Netherlands
2. Pediatric Gastroenterology and Cystic Fibrosis Unit, Department of Human Pathology in Adulthood and Childhood “G. Barresi”, “G. Martino” University Hospital, University of Messina, Messina, Italy
3. Global Medical Affairs, Sandoz/HEXAL AG, Holzkirchen, Germany
4. Global Clinical Development, Sandoz/HEXAL AG, Holzkirchen, Germany