title: X-linked mental retardation and infantile spasms in two brothers.
mesh_terms: D002648:Child; D002675:Child, Preschool; D008040:Genetic Linkage; D006801:Humans; D008607:Intellectual Disability / Q000235:genetics*; D008297:Male; D013036:Spasms, Infantile / Q000235:genetics*; D014960:X Chromosome