title: Letter: Rates of XYY genotype in penal and mental settings.
mesh_terms: D002869:Chromosome Aberrations; D005838:Genotype; D006778:Hospitals, Psychiatric; D006801:Humans; D008297:Male; D011329:Prisoners; D011330:Prisons; D012730:Sex Chromosomes; D012920:Social Behavior Disorders; D006113:United Kingdom