Affiliation: | aDivision of General Thoracic and Oesophageal Surgery, Department of Cardiothoracic Surgery, Helsinki University Central Hospital, Haartmaninkatu 4, PO Box 340, FIN-00029 HUS, Helsinki, Finland;bResearch Laboratory, Department of Physiology, University of Turku, Turku, Finland;cDepartment of Medicine, Division of Gastroenterology, Helsinki University Central Hospital, Helsinki, Finland |