MADISON, Wis.--(BUSINESS WIRE)--Cellular Dynamics International (CDI) and Promega have entered into a research collaboration with the goal of bringing more relevant and highly predictive toxicity testing to the drug discovery process. Pharmaceutical discovery scientists will now be able to combine bioassays with human cardiomyocytes to improve prediction of unintentional, detrimental side effects that have previously remained undetected until late in the development process or after release of the drug to the general public.