Spinal muscular atrophy (a report of 44 cases).
D000293:Adolescent; D000328:Adult; D002648:Child; D002675:Child, Preschool; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007223:Infant; D008297:Male; D008875:Middle Aged; D009133:Muscular Atrophy / Q000145:classification / Q000175:diagnosis; D013118:Spinal Cord Diseases / Q000145:classification / Q000175:diagnosis