title: Intratracheal injection into rats of size-graded silica particles.
mesh_terms: D000818:Animals; D001835:Body Weight; D003094:Collagen; D006651:Histocytochemistry; D066298:In Vitro Techniques; D008297:Male; D009929:Organ Size; D011658:Pulmonary Fibrosis / Q000209:etiology*; D051381:Rats; D012822:Silicon Dioxide / Q000633:toxicity*
chemical_list: D012822:Silicon Dioxide; D003094:Collagen