title: Gastrointestinal cancer in workers exposed to quartz.
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D005770:Gastrointestinal Neoplasms / Q000139:chemically induced*; D006801:Humans; D008297:Male; D008875:Middle Aged; D009784:Occupational Diseases / Q000139:chemically induced*; D011791:Quartz / Q000009:adverse effects*; D012306:Risk; D012822:Silicon Dioxide / Q000009:adverse effects*
chemical_list: D011791:Quartz; D012822:Silicon Dioxide