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Elevation of the levels of circulating immune complexes frequently accompanies HIV-1 infection and is a prognostic indicator of clinical progression from asymptomatic infection to AIDS .
 protein: circulating immune complexes
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
Answer:
 protein: circulating immune complexes