3898
A linkage study in 30 Becker muscular dystrophy ( BMD ) kindreds using three cloned DNA sequences from the X chromosome which demonstrate restriction fragment length polymorphisms ( RFLPs ) , suggests that the BMD gene is located on the short arm of the X chromosome , in the p21 region .
 Becker muscular dystrophy, BMD, BMD
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Disease 
Text: {0} 
Answer:
 Becker muscular dystrophy, BMD, BMD