Trastuzumab Active Not Recruiting Phase 3 Trials for Adenocarcinoma Of Esophagus / Stage IIIA Esophageal Cancer / Stage IIIA Esophageal Cancer AJCC v7 / Stage IB Esophageal Cancer AJCC v7 / Stage IIB Esophageal Cancer AJCC v7 / Stage IIA Esophageal Cancer / Adenocarcinomas of the Gastroesophageal Junction / Stage IIB Esophageal Cancer / Stage IIA Esophageal Cancer AJCC v7 / Stage IIIB Esophageal Cancer AJCC v7 / Stage IIIB Esophageal Cancer / Stage IB Esophageal Cancer Treatment