Po-han Chen is the CEO and Founder of CancerFree Biotech, which has developed the Ex Vivo Avatar (E.V.A.) system. This unique technology isolates circulating tumor cells from in-situ tumors in the bloodstream and increases their number through specialized cell culture. The E.V.A. system uses 3D scaffolds to replicate the in vivo extracellular matrix, allowing efficient tumor cell proliferation with a success rate of around 90% across various cancer types. This system has been applied in over 900 successful cases and enables testing of approximately 100 types of generic drugs.