[DIAGNOSIS OF THE EARLY STAGE OF STOMACH CANCER].
D005745:Gastric Acidity Determination; D006801:Humans; D009369:Neoplasms / Q000175:diagnosis*; D009780:Occult Blood; D013274:Stomach Neoplasms
GASTRIC ACIDITY DETERMINATION; NEOPLASM DIAGNOSIS; OCCULT BLOOD; STOMACH NEOPLASMS