title: Supernumerary chromosomes in six patients.
mesh_terms: D000328:Adult; D002869:Chromosome Aberrations; D002871:Chromosome Banding; D002901:Chromosomes, Human, 13-15; D002904:Chromosomes, Human, 21-22 and Y; D005260:Female; D005819:Genetic Markers; D006801:Humans; D007223:Infant; D008607:Intellectual Disability / Q000235:genetics*; D008297:Male; D009697:Nucleolus Organizer Region
chemical_list: D005819:Genetic Markers