aDivision of Gastrointestinal Medical Oncology and Neuroendocrine Tumors, European Institute of Oncology (IEO) IRCCS, Milan, Italy
bMolecular Medicine Program, University of Pavia, Pavia, Italy
cDivision of Medical Oncology Mayo Clinic, Rochester, MN, USA
dMedical Oncology Department, Hospital Universitario Doce de Octubre, Imas12, UCM, Madrid, Spain
eDepartment of Internal Medicine, Sector Endocrinology, Rotterdam, the Netherlands
fVall Hebron University Hospital and Vall Hebron Institute of Oncology (VHIO), Barcelona, Spain
gDepartment of Hematology and Oncology Mayo Clinic, Phoenix, AZ, USA
hHematology-Oncology Unit, Fourth Department of Internal Medicine, Attikon Hospital, Medical School, National and Kapodistrian University of Athens, Athens, Greece
i1st Department of Propaedeutic Internal Medicine, Endocrine Unit, National and Kapodistrian, University of Athens, Athens, 11527, Greece
jOncology Unit and Centro Documentazione Osteonecrosi, Azienda Ospedaliera SS Antonio e Biagio e Cesare Arrigo, Alessandria, Italy
kNeuroendocrine Tumors Unit, ENETS Center of Excellence, Department of Endocrinology and Metabolism Service, Hadassah-Hebrew University Medical Center, Jerusalem, Israel
lData Management-Clinical Trial Office. Scientific Direction. European Institute of Oncology (IEO) IRCCS, Milan, Italy
mDepartment of Statistics and Quantitative Methods, University of Milan-Bicocca, Milan, Italy
∗Corresponding author: Division of Gastrointestinal Medical Oncology and Neuroendocrine Tumors, European Institute of Oncology, Via G. Ripamonti 435, Milan, 20141, Italy.