Algorithms|CD4-Positive T-Lymphocytes|Computational Biology|DNA, Complementary|Data Interpretation, Statistical|False Negative Reactions|False Positive Reactions|Gene Expression Profiling|Gene Expression Regulation|HIV|Humans|Internet|Models, Genetic|Models, Statistical|Nucleic Acid Hybridization|Oligonucleotide Array Sequence Analysis|Reproducibility of Results|Sensitivity and Specificity|Sequence Analysis, DNA|Software