title: Brain tumors among operating engineers in the chemical and petrochemical industry in Texas and Louisiana.
mesh_terms: D000328:Adult; D000368:Aged; D001932:Brain Neoplasms / Q000401:mortality*; D002617:Chemical Industry; D006801:Humans; D008145:Louisiana; D008297:Male; D008875:Middle Aged; D009784:Occupational Diseases / Q000401:mortality*; D009790:Occupations; D010578:Petroleum; D013781:Texas
chemical_list: D010578:Petroleum