Treatment Outcome / Iran / Humans / Female / Gastric Cancer / Male / Aged / Middle Aged / Adult / Chi Square Distribution / Early Diagnosis / Enzyme Linked Immunosorbent Assay / Predictive value of tests / Control Group / Adenocarcinoma / Case Control Studies / Male / Aged / Middle Aged / Adult / Chi Square Distribution / Early Diagnosis / Enzyme Linked Immunosorbent Assay / Predictive value of tests / Control Group / Adenocarcinoma / Case Control Studies