title: [Myotonic dystrophy--a clinical and genetic study of 4 families].
mesh_terms: D000293:Adolescent; D000328:Adult; D002648:Child; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009223:Myotonic Dystrophy / Q000235:genetics*; D011379:Prognosis