I read while ago that there are around 4,000 papers last 20 years for 3D/4D bioprinting and 70% of them are last 5 years. Every year there are hundreds of scientific papers regards stem cells/iPSCs, CRISPR/Cas9 (and all variants), so technology is in early stage, but moving with big steps last couple of years. Probably, because biomanufacturing technology is advancing with big steps, as well.