... extraction, amplification and pooling, sequence alignments and interpretations), ii)the availability of the final product in a reproducible and standardized way, and iii) the cost per sample.Clinical ... population.Tropism testing on clinical samples using VTA In order to verify the genotypic tropism p redictions, apopulation tropism phenotyping test was performed on each sample, usin g a smaller ... (Selzentry/Celsentri, Pfizer, NY) is achemokine co-receptor antagonist, designed to preventHIV-1 infection of CD4+T-cells by blocking the CCR5co-receptor. Since the drug is only effective in indivi-duals...