EPCAM and neoplasm: H&E stained FFPE (formalin-fixed, paraffin-embedded) tissue sections from each primary-derived tumor specimen (P54, P59, P61, and P63) in each case reveals heterogeneous histology (Fig S5, A), from which EpCAM+ epithelial cells were positively selected for in vitro in the absence of factors known to be required for normal epithelial cell growth12 and subsequently loaded into the VMT platform (Fig S5, B and C).