Eriksson et al. delivered pVAX plasmid encoding rhesus macaque PSA (rhPSA), pVAX/rhPSA, to patients with biochemical evidence of prostate cancer relapse i.d. followed by EP with the DermaVax device (BTX/Harvard Appartus) and monitored patients for evidence of decrease in PSA-DT or generation of PSA-specific T cells [47]. This evidence concerns the gene KLK3 and Familial prostate cancer.