title: [Sister chromatid exchanges in 15 patients with Down's syndrome].
mesh_terms: D000293:Adolescent; D000328:Adult; D002648:Child; D002675:Child, Preschool; D003434:Crossing Over, Genetic; D004314:Down Syndrome / Q000235:genetics*; D005260:Female; D006801:Humans; D007223:Infant; D008297:Male; D012854:Sister Chromatid Exchange