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Duchenne muscular dystrophy ( DMD ) is an X - linked recessive genetic disorder for which the biochemical defect is as yet unknown .
 Duchenne muscular dystrophy, DMD, X - linked recessive genetic disorder
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Disease 
Text: {0} 
Answer:
 Duchenne muscular dystrophy, DMD, X - linked recessive genetic disorder