MIAMI--(BUSINESS WIRE)--Brickell Biotech, Inc. ("Brickell"), a clinical-stage pharmaceutical company focused on the development of differentiated, innovative therapeutics to satisfy current unmet medical needs in the global dermatology markets, today announced that Patricia Walker, MD, PhD, has joined as President and Chief Scientific Officer. Dr. Walker, a board-certified dermatologist specializing in medical and aesthetic dermatology, most recently served as the Chief Medical Officer for Kythera Biopharmaceuticals, Inc.