803
Furthermore , DNA marker studies were conducted using known polymorphisms of the C6 , C7 , and C9 genes , confirming the linkage of the observed C9 mutations with defined haplotypes . .
 None
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Disease 
Text: {0} 
Answer:
 None