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Dr. Klein joined the Board in April 2020. He has been the Chief Development Officer at PTC Therapeutics, Inc. (“PTC”) since April 2020. Dr. Klein joined PTC in October 2019 as Global Head Gene and Mitochondrial Therapies and became Global Head Clinical Development in March 2020. Prior to joining PTC, he was Chief Executive Officer and a Director of BioElectron Technology Corporation, or “BioElectron,” from 2018 to 2019. Dr. Klein served as the Chief Medical Officer of BioElectron from 2013 to 2019 and was Senior Vice President, Clinical Science at BioElectron from 2012 to 2013. Dr. Klein has a BA from the University of Pennsylvania, an MD from Yale University School of Medicine and an MS in epidemiology from the University of Washington School of Public Health.