Stemina also said its chief scientific officer, Gabriela Cezar, has taken a one-year leave of absence from her faculty position at the University of Wisconsin-Madison to work in Brazil with Burrill & Co., a California venture capital firm that invests in life sciences companies. Cezar will continue to be the companyâ??s part-time chief scientific officer, and she will split her time between Madison and Brazil, Donley said.