[Eight-year follow-up of sputum cytology screening in tin miners and chemopreventive treatment of the precancerous lesion].
D006801:Humans; D008175:Lung Neoplasms / Q000517:prevention & control*; D008403:Mass Screening; D008906:Mining; D011230:Precancerous Conditions / Q000188:drug therapy*; D013183:Sputum / Q000166:cytology*; D014001:Tin; D014801:Vitamin A / Q000627:therapeutic use
D014801:Vitamin A; D014001:Tin