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??(leukodystrophy)??????????????MLD???ALD??MNGIE?????Pelizaeus-Merzbacher??PKU???????Alexander?MRI????????????????????????????????????

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???@?(dysmyelinating disease)???(demyelinating disease)??Canavan??(myelinolytic)???????

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2????????????????\"\"??HDL?
3????????????30???\"?\"3??10???????????
4???????????????
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