aDepartment of Hepatology and Gastroenterology, Interdisciplinary Center for Metabolism,
Endocrinology, and Diabetes, Charité-Universitätsmedizin Berlin, Berlin, Germany;
bDepartment of Pathology, University of Parma, Parma, Italy;
cDepartment of Gastroenterology, Philipps-Universität, Marburg, Germany;
dSection for Endocrine Oncology, Department of Medical Sciences, University Hospital,
Uppsala, Sweden;
eDepartment of Nuclear Medicine, Erasmus University Medical Center, Rotterdam, The
Netherlands;
fDepartment of Internal Medicine, Erasmus University Medical Center, Rotterdam, The
Netherlands;
gRoyal Free Hospital, London, UK;
hUppsala University, Department of Endocrine Oncology, Uppsala, Sweden;
iUniversity of Bern, Institute of Pathology, Bern, Switzerland;
jSahlgrenska sjukhuset, Department of Pathology, Gothenburg, Sweden;
kOspedale S. Andrea, Department of Gastroenterology, Rome, Italy;
lHôpital Beaujon, Department of Gastroenterology, Clichy, France, and
mDepartment of Surgery, Gothenburg University, Gothenburg, Sweden