[1] Haukeland Hosp, Dept Oncol, Bergen, Norway
[2] Univ Bergen, Dept Clin Sci, Bergen, Norway
[3] MD Anderson Canc Ctr Madrid, Dept Med Oncol, Madrid, Spain
[4] Friedrich Alexander Univ Erlangen Nurnberg, Dept Med 1, Erlangen, Germany
[5] Netherlands Canc Inst, Dept Gastrointestinal Oncol, Amsterdam, Netherlands
[6] European Inst Oncol, Div Gastrointestinal Med Oncol & Neuroendocrine Tu, IEO, IRCCS, Milan, Italy
[7] Beatson Oncol Ctr, Dept Clin Oncol, Glasgow City, Scotland
[8] Copenhagen Univ Hosp, Rigshospitalet, ENETS Ctr Excellence, Dept Surg & Clin Endocrinol, Copenhagen, Denmark
[9] Univ Hosp Basel, ENETS Ctr Excellence, Dept Endocrinol Diabet & Metab, Basel, Switzerland
[10] Univ Bologna, Nucl Med, Alma Mater Studiorum, Bologna, Italy
[11] Azienda Osped Univ Bologna, IRCCS, Bologna, Italy
[12] Univ Paris Cite, Bichat Hosp, AP HP, Dept Pathol, Paris, France
[13] Uppsala Univ, Dept Med Sci Endocrine Oncol, Uppsala, Sweden
[14] Haukeland Hosp, Dept Oncol, N-5021 Bergen, Norway