TY - RPRT TI - Progress and problems in evaluating and validating alternative assays in toxicology. AU - D M Stark AU - C Shopsis AU - E Borenfreund AU - H Babich DO - 10.1016/0278-6915(86)90091-8 UR - https://pubmed.ncbi.nlm.nih.gov/3781407/ ID - 3781407 ER -