title: MRX review.
authors.affiliation: INSERM unité 129, Paris, France. chelly@icgm.cochin.inserm.fr
authors.forename: J
authors.initials: J
authors.lastname: Chelly
mesh_terms: D002874:Chromosome Mapping; D018740:Genetic Heterogeneity; D008040:Genetic Linkage; D006801:Humans; D008607:Intellectual Disability / Q000235:genetics* / Q000473:pathology; D014960:X Chromosome / Q000235:genetics*