Lawson Macartney, B.V.M.S., Ph.D. , has served as the Chairperson of our Board since May 2015 and as a member of our Board since May 2014. From January 2017 to June 2017, Dr. Macartney served as Chief Executive Officer of Scout Bio Inc., a gene therapy company developing therapies for companion animals. Dr. Macartney serves on the Board of Dechra PLC, an international animal health pharmaceutical company based in the United Kingdom, and on the Supervisory Board of the Netherlands Translational Research Centre, a preclinical biopharmaceutical company based in The Netherlands. He served as President, Chief Executive Officer and a member of the board of directors of Ambrx Inc., a biopharmaceutical company, from February 2013 to June 2015. Prior to Ambrx, Dr. Macartney served at Shire AG, a specialty biopharmaceutical company, as Senior Vice President of the Emerging Business Unit from 2011 to 2013, where he was responsible for discovery initiatives through Phase 3 development of Shire s Specialty Pharmaceutical portfolio. Prior to joining Shire AG, he served at GSK, a pharmaceutical company, from 1999 to 2011, as Senior Vice President of Global Product Strategy and Project/Portfolio Management from 2007 to 2011, as Senior Vice President, Cardiovascular and Metabolic Medicine Development Center from 2004 to 2007, and as Vice President, Global Head of Cardiovascular, Metabolic and Urology Therapeutic Areas from 1999 to 2004. Prior to joining GSK, Dr. Macartney was employed at Astra Pharmaceuticals from 1998 to 1999 in leadership roles in operations, marketing and sales, and served as Executive Director, Commercial Operations at AstraMerck, Inc., a pharmaceutical company, from 1996 to 1998. Dr. Macartney received his Ph.D. from Glasgow University in Scotland in 1982, where he was a Royal Society Research Fellow, and his B.V.M.S. in 1979 from Glasgow University Veterinary School. He is also trained in diagnostic pathology and is a Fellow of the Royal College of Pathologists. We believe that Dr. Macartney s extensive experience in leadership positions at numerous pharmaceutical companies qualifies him to serve on our Board.