Howard G. Welgus, M.D. has served as a member of our Board of Directors since August 2020. Dr. Welgus served as our Chief Medical Officer from April 2017 to July 2020. From February 2016 to June 2018, Dr. Welgus served as the Chief Medical Officer at Verrica Pharmaceuticals Inc. Prior to joining Verrica, Dr. Welgus served as the Chief Medical Officer at Thesan Pharmaceuticals Inc. from September 2012 to November 2016 and served as the Chief Medical Officer at Nycomed US Inc. from May 2009 to November 2010. From 1999 to 2009, he served as the Vice President and head of the Dermatology and Inflammation therapeutic areas in Discovery at Pfizer Inc. in Ann Arbor, MI. Prior to joining the private sector, Dr. Welgus was a faculty member at Washington University for 17 years. Dr. Welgus is a board-certified dermatologist and received a M.D. from Washington University School of Medicine in St. Louis and a B.A. in Biology from Rice University. We believe that Dr. Welgus is qualified to serve on our Board of Directors because of his extensive knowledge of our business, expertise in dermatology and his experience in the biopharmaceutical industry.