Intrafamilial variability in spinal muscular atrophy.
D000208:Acute Disease; D000293:Adolescent; D000328:Adult; D002648:Child; D002675:Child, Preschool; D002908:Chronic Disease; D005260:Female; D006801:Humans; D008297:Male; D009133:Muscular Atrophy / Q000235:genetics*; D013122:Spinal Diseases / Q000235:genetics*