1. Department of Pathology and Laboratory Medicine, Children’s Hospital Philadelphia, Philadelphia, Pennsylvania 19104, United States
2. The Penn Medicine/CHOP Center of Excellence for Friedreich’s Ataxia Research, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
3. Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
4. Department of Pharmaceutical Sciences, School of Pharmacy, University of Pittsburgh, Pittsburgh, Pennsylvania 15261, United States
5. Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States