Affiliation: | 1. Department of Medicine Solna, Karolinska Institutet, Division of endoscopy, Karolinska University Hospital, Stockholm, Sweden;3. Stress Research Institute, Stockholm University, Stockholm, Sweden;4. Department of Psychology, Macquarie University, Sydney, New South Wales, Australia;5. Division of Gastroenterology and Hepatology, Third Department of Internal Medicine, Kansai Medical University, Osaka, Japan |