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Executive Partner, Flagship Pioneering

David Epstein has served as our Chairman and as a member of our board of directors since December 2017. Mr. Epstein has also served as Executive Partner at Flagship Pioneering Inc., a private equity and venture capital firm, since January 2017. Prior to this, Mr. Epstein served as Chief Executive Officer of Novartis Pharmaceuticals Corporation, a pharmaceutical company. He currently serves on the boards of directors of International Flavors and Fragrances, Inc. (NYSE: IFF), Evelo Biosciences, Inc. (Nasdaq: EVLO) and of Rubius Therapeutics, Inc. (Nasdaq: RUBY), as Executive Chairman. Mr. Epstein holds an M.B.A. in finance and marketing from Columbia Business School and a B.S. in pharmacy from Rutgers University.