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Metachromatic Leukodystrophy ( MLD ) is a neurodegenerative disease in which the lysosomal enzyme , Aryl sulfatase A ( ARSA ) is deficient .
 Metachromatic Leukodystrophy, MLD, neurodegenerative disease
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Disease 
Text: {0} 
Answer:
 Metachromatic Leukodystrophy, MLD, neurodegenerative disease