[Histopathological study of the nasal and paranasal sinuses of germ-free guinea pigs exposed to sulfur dioxide (SO 2 )].
D000397:Air Pollution; D000818:Animals; D005856:Germ-Free Life; D006168:Guinea Pigs; D010256:Paranasal Sinuses / Q000187:drug effects / Q000473:pathology*; D013458:Sulfur Dioxide / Q000506:poisoning*
D013458:Sulfur Dioxide