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Our study group consisted of 74 HIV - positive homosexual men belonging to groups II B , III and IV C2 from the Centers for Disease Control ( CDC ) classification of HIV disease .
 Disease: HIV disease
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Disease, Chemical 
Text: {0} 
Answer:
 Disease: HIV disease