title: Welding fumes in shipyards.
mesh_terms: D000328:Adult; D000395:Air Pollutants, Occupational / Q000506:poisoning; D006801:Humans; D008171:Lung Diseases / Q000453:epidemiology* / Q000209:etiology; D008297:Male; D008875:Middle Aged; D009784:Occupational Diseases / Q000453:epidemiology* / Q000209:etiology; D012846:Singapore; D012907:Smoking; D014896:Welding
chemical_list: D000395:Air Pollutants, Occupational