P28-04 Towards Animal-Free DIT Testing: Establishing a Human Stem Cell-Based Assay for Early Hematopoiesis - C. Spruck; A. Bartel; G. Brockerhoff; S. Fayyaz; Q. Li; F.A. Grimm; E. Fritsche; K. Koch; J. Tigges (Toxicology Letters, 2025)