title: Long term retention of colloidal thorium dioxide in the liver and spleen of Xenopus laevis Daudin.
mesh_terms: D000818:Animals; D007728:Kupffer Cells / Q000032:analysis; D008099:Liver / Q000032:analysis / Q000166:cytology / Q000378:metabolism*; D008854:Microscopy, Electron; D013154:Spleen / Q000032:analysis / Q000166:cytology / Q000378:metabolism*; D013911:Thorium Dioxide / Q000032:analysis; D013997:Time Factors; D014981:Xenopus
chemical_list: D013911:Thorium Dioxide