NCT03279601 2017-09-12Study to Compare Capecitabine Combined With Dacarbazine(CAPDTIC) Versus Capecitabine Combined Temozolomide(CAPTEM) in Advanced and Metastatic Gastrointestinal Pancreatic and Esophageal Neuroendocrine TumorPeking UniversityPhase 2 Unknown148 enrolled