title: A fragile secondary constriction on chromosome 2 in five patients with different clinical features.
mesh_terms: D000015:Abnormalities, Multiple / Q000235:genetics; D000328:Adult; D002648:Child; D002873:Chromosome Fragility; D002900:Chromosomes, Human, 1-3 / Q000648:ultrastructure*; D005260:Female; D006801:Humans; D007231:Infant, Newborn; D008607:Intellectual Disability / Q000235:genetics; D008297:Male; D010641:Phenotype