title: Letter: Chromosome damage produced by psoralen and ultraviolet light.
mesh_terms: D000818:Animals; D002478:Cells, Cultured; D002875:Chromosomes / Q000187:drug effects*; D003374:Coumarins / Q000633:toxicity*; D006224:Cricetinae; D005363:Ficusin / Q000633:toxicity*; D014466:Ultraviolet Rays / Q000009:adverse effects*
chemical_list: D003374:Coumarins; D005363:Ficusin