title: Exposure to hard metal.
mesh_terms: D003035:Cobalt / Q000009:adverse effects*; D006801:Humans; D011658:Pulmonary Fibrosis / Q000209:etiology*; D014414:Tungsten / Q000009:adverse effects*; D017973:Tungsten Compounds
chemical_list: D017973:Tungsten Compounds; C002802:tungsten carbide; D003035:Cobalt; D014414:Tungsten