The Herbert-Stiller-Prize 2019 was awarded by the society Doctors Against Animal Experimentation on occasion of the society's 40th anniversary in Frankfurt am Main, Germany on September 14, 2019. The prize aims to support the winners to realize a planned research project in the field of medicine or life science. Prof. Jens Kurreck and Dr Johanna Berg of the TU Berlin won first prize. Their project aims to optimize animal product-free 3D bioprinting. The second prize went to Dr Mario Rothbauer of the TU Vienna, who plans to develop a human-based cell culture model of the synovium as an organ-on-a-chip model for rheumatoid arthritis research. Both projects will be supported with €20.000.