1. PHARMO Institute for Drug Outcomes Research, Utrecht, Netherlands;
2. Global Medical Affairs, Medical Evidence and Observational Research Centre, AstraZeneca Gothenburg, Mölndal, Sweden (at the time of the study);
3. AstraZeneca Gothenburg, Mölndal, Sweden (at the time of the study);
4. Department of Gastroenterology and Hepatology, Erasmus MC University Medical Center, Rotterdam, Netherlands