NCT03980925 2025-01-13Platinum-doublet Chemotherapy and Nivolumab for the Treatment of Subjects With Neuroendocrine Neoplasms (NENs) of the Gastroenteropancreatic (GEP) Tract or of Unknown (UK) Origin.Grupo Espanol de Tumores NeuroendocrinosPhase 2 Completed37 enrolled 25 charts