BioIVT, a provider of research models and services for drug and diagnostic development, has acquired PPA Research Group, Inc., a human hematologic product provider, based in Gray, TN. This acquisition will expand BioIVT’s immunology and disease-state product portfolios to support immuno-oncology and cell therapy researchers.   PPA Research Group operates full-service donor centers in Johnson City, TN and Berkeley, CA focused primarily on producing leukopaks. Leukopaks are used during drug deve...