[Development of the fibergastroscope with a fiber optics illuminator and the improvement of the fibergastroscope and fibergastroscopic biopsy in the diagnosis of early gastric cancer].
D000328:Adult; D000368:Aged; D001706:Biopsy; D005260:Female; D020699:Gastroscopes; D006801:Humans; D008297:Male; D008722:Methods; D008875:Middle Aged; D013274:Stomach Neoplasms / Q000175:diagnosis*; D013997:Time Factors