4176
Individuals with subtotal complement C6 deficiency possess a C6 molecule that is 14 % shorter than normal C6 and present in low but detectable concentrations ( 1 - 2 % of the normal mean ) .
 subtotal complement C6 deficiency
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Disease 
Text: {0} 
Answer:
 subtotal complement C6 deficiency