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Of 57 informative meioses , two crossovers were noted between the C2 deficiency gene and the HLA - B gene , with a recombinant fraction of 0 .
 Disease: C2 deficiency
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: C2 deficiency