To compare the serum levels of β 2 -microglobulm (β2M), neopterin (NP), TNF-α and soluble receptors of TNF-α (sTNF-R55 and sTNF-R75) and interleukin-2 (sIL-2R) in a population of intravenous drug abusers according to whether or not they had HIV-1 infection and to the stage of the HIV-1 infection. A cross-sectional study was performed at four drug detoxification centers in Barcelona, and...
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