Dr. Walker has served on our Board of Directors since June 2013. Dr. Walker is the Chair of the board of directors, and since January 2024 the interim Chief Executive Officer at Aclaris Therapeutics, Inc., a publicly traded drug development company, having previously served as President and Chief Executive Officer until December 2022. He is a board-certified dermatologist and serial entrepreneur with over 25 years of experience in the biopharmaceutical industry. Prior to founding Aclaris Therapeutics, Inc. in 2012, he was co-founder, President and CEO of Vicept Therapeutics, Inc. (acquired by Allergan, Inc.) from 2009 to 2012. Dr. Walker has co-founded and led a number of life science companies: Octagon Research Solutions, Inc., a software and services provider to biopharmaceutical companies (acquired by Accenture plc); Trigenesis Therapeutics, Inc., a specialty dermatology company where he served as Chief Medical Officer (acquired by Dr. Reddy s Laboratories Ltd); and Cutix Inc., a commercial dermatology company that markets PreSun , a sunscreen brand acquired from Bristol-Myers Squibb Co. He began his pharmaceutical industry career at Johnson & Johnson, Inc. In addition to Aclaris, Dr. Walker currently is also on the board of directors of Zoomi, Inc, and Myota, Inc. Dr. Walker previously served on the board of directors for Octagon, a contract research organization. He is also on the Advisory Board of Flexible Medical Systems LLC, a privately held medical device company. Dr. Walker received his M.B.A. from The Wharton School of the University of Pennsylvania, his D.O. from Philadelphia College of Osteopathic Medicine, and a B.A. in Biology from Lehigh University. Dr. Walker s experience as a founder of a number of healthcare companies, strong background in clinical and product development, and substantial knowledge of the pharmaceutical industry contributed to our conclusion that he should serve as a director of our Company.