MD MSc S. Haal Position PhD Candidate Main activities Research Specialisation Gastroenterology and Hepatology Focus of research The prophylactic use of ursodeoxycholic acid (UDCA) in preventing symptomatic gallstone disease after Roux-and-Y gastric bypass (RYGB). Amsterdam UMC Research Institutes Amsterdam Gastroenterology Endocrinology Metabolism CCA - Treatment and quality of life AMC departments Graduate School Key publications All Publications