i survived esophageal cancerchances of surviving esophageal canceresophageal cancer survival rateesophageal cancer survivors5 year survival rate esophageal canceresophageal cancer treatment prognosisesophageal cancer curablestage 3 esophageal cancer treatmentesophageal cancer survival rate by ageesophageal cancer survivors networkstage 3 esophageal cancer survivorsmetastatic esophageal cancer prognosis