3750
Recent progress has resulted in part of the gene mutated in Duchenne and the milder Becker muscular dystrophies being cloned and has suggested that the gene itself extends over 1 , 000 to 2 , 000 kilobases ( kb ) .
 Duchenne and the milder Becker muscular dystrophies
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Disease 
Text: {0} 
Answer:
 Duchenne and the milder Becker muscular dystrophies