aDepartment of Gastroenterology, Beaujon Hospital, Clichy, France;
bDepartment of Oncology, Institut Català d’Oncologia, Barcelona, Spain;
cDepartment of Surgery, Verona University, Verona, Italy;
dDepartment of Endocrinology and Metabolism, Genimatas Hospital, Athens, Greece;
eDepartment of Gastroenterology, Beaujon Hospital, Clichy, France;
fDepartment of Endocrinology, Erasmus MC University, Rotterdam, The Netherlands;
gDepartment of Internal Medicine, Martin University, Martin, Slovakia;
hDepartment of Propaedeutic Internal Medicine, Laiko Hospital, Athens, Greece;
iDepartment of Nuclear Medicine, Erasmus MC University, Rotterdam, The Netherlands;
jDepartment of Gastroenterology, Beaujon Hospital, Clichy, France;
kDepartment of Gastroenterology, Royal Free Hospital, London, UK;
lDepartment of Cell Biology, National Institute of Health, Bethesda, Md., USA;
mDepartment of Endocrinology, University Hospital, Uppsala, Sweden