University of Cincinnati Medical Center and Cincinnati Children's Hospital Medical Center are two of the nation's leading institutions for research into the life sciences, as their physicians and researchers seek new, promising ways to diagnose and treat cancer, stroke and heart disease, as well as break new ground in the understanding of more exotic diseases. Entrepreneurs are pushing the medical boundaries at BIO/Start, a life sciences startup center that has helped launch 85 companies, producing nearly 200 high-paying jobs.