title: Letter: Ultrasound and marrow-cell chromosomes.
mesh_terms: D000818:Animals; D001854:Bone Marrow Cells; D002478:Cells, Cultured; D002869:Chromosome Aberrations; D002875:Chromosomes; D066298:In Vitro Techniques; D008938:Mitosis; D051381:Rats; D014465:Ultrasonics / Q000009:adverse effects*