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Further studies suggested that low dilutions of C5D serum contain a factor ( or factors ) interfering at some step in the hemolytic assay of C5 , rather than a true C5 inhibitor or inactivator .
 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