<qa>  What is the name of the gene transcription product that may be useful as predictors or indicatorsTo assess the quantitative real time PCR results of oligonucleotide probes for a number of gene transcription products PCNA, cyclin-D1, ER alpha, PR, pS2, 450 aromatase, bcl-2, bax, caspase-3, and VEGFR that may be useful as predictors or indicators of response to letrozole 