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In specific C5 titrations , however , it was noted that when limited amounts of C5 were assayed in the presence of low dilutions of either C5D serum , curving rather than linear dose - response plots were consistently obtained , suggesting some inhibitory effect .
 Disease: C5D
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Disease 
Text: {0} 
Answer:
 Disease: C5D