The most recent study attempting to remove human leukemia cells from testicular cells using the markers EpCAM+/HLA-ABC−/CD49e− showed some progress [52]; however, the bioassay method used for post-sorting detection of leukemia cells was not sensitive enough (0.2% sensitivity) and the false negative rate was high (>60%) [52,75]. Here, EPCAM is linked to leukemia.