Dr. Booth has served as Chairman of our board of directors and has been a member of our board of directors since September 2015. Dr. Booth was our co-founder, President and Chief Executive Officer from September 2015 to August 2017. Dr. Booth joined Atlas Venture in 2005, and currently serves as a partner of Atlas Venture. Previously, from 2004 to 2005, Dr. Booth was a principal at Caxton Health Holdings L.L.C., a healthcare-focused investment firm, where he focused on the firm’s venture capital activities. He currently serves as chair of the board of directors of Vigil Neuroscience, Inc. a publicly traded biotechnology company and as a member of the board of Sionna Therapeutics, Inc. a publicly traded biotechnology company. He also serves as either Chair or member of the board of directors of multiple privately held companies. Dr. Booth holds a D.Phil. in molecular immunology from Oxford University’s Nuffield Department of Medicine and a B.S. in biochemistry from Pennsylvania State University.