4187
The molecular mechanisms by which the expanded repeat causes the clinically variable and multisystemic disease , myotonic dystrophy , are not understood .
 multisystemic disease, myotonic dystrophy
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Disease 
Text: {0} 
Answer:
 multisystemic disease, myotonic dystrophy