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