Based in San Diego, CA, Organovo is the only public company that operates in the field of human tissue 3D printing. Its bioprinter has already achieved some breakthrough results in the printing of live liver tissue that responds to drug stimuli. Bioprinting organs such as liver, kidney and skin for transplants is one of the great promises of additive manufacturing methods and it is usually explored most at a academic level, without real commercial applications in sight for at least the next 5 years. However Organovo's technology is viewed as viable by the scientific community and holds great potential.