Cluster Analysis|DNA|Gene Expression Profiling|Gene Expression Regulation, Neoplastic|Humans|Male|Melanoma|Oligonucleotide Array Sequence Analysis|Pattern Recognition, Automated|Prostatic Hyperplasia|Prostatic Neoplasms|Quality Control|Reference Values|Reproducibility of Results|Sensitivity and Specificity|Sequence Alignment|Sequence Analysis, DNA|Stochastic Processes