title: The thyroid in the germfree rat: a light and electron microscopic study.
mesh_terms: D000818:Animals; D005856:Germ-Free Life; D008297:Male; D008853:Microscopy; D008854:Microscopy, Electron; D051381:Rats; D013961:Thyroid Gland / Q000166:cytology / Q000648:ultrastructure*