1. Division of Gastroenterology and Hepatology; Northwestern University; Chicago; IL; USA
2. AstraZeneca R&D; Mölndal; Sweden
3. Medical Evidence Centre; Global Medical Affairs; AstraZeneca; Madrid; Spain
4. Department of Gastroenterology, Hospital Universitario de la Princesa; Instituto de Investigación Sanitaria Princesa (IP) and Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBEREHD); Madrid; Spain