Matthew B. Klein, M.D., M.S., FACS, is chief executive officer at PTC. Prior to joining PTC, Dr. Klein was chief executive officer of BioElectron Technology Corporation, a biotechnology company focused on the development of redox-active small molecules for mitochondrial disease and related disorders of oxidative stress. Before joining BioElectron, Dr. Klein was the Auth-Washington Research Foundation chair of restorative burn surgery at the University of Washington. Dr. Klein completed his bachelor’s degree in history and chemistry at the University of Pennsylvania where he graduated summa cum laude and Phi Beta Kappa. Dr. Klein earned his medical degree with honors from Yale University.