title: Spontaneous loss of axons in sympathetic unmyelinated nerve fibers of the rat during development.
mesh_terms: D000818:Animals; D000831:Animals, Newborn; D001369:Axons; D002454:Cell Differentiation; D008854:Microscopy, Electron; D008858:Microscopy, Phase-Contrast; D051381:Rats; D012583:Schwann Cells; D013564:Sympathetic Nervous System / Q000166:cytology / Q000254:growth & development*