1. Rogel Cancer Center, University of Michigan, Ann Arbor, Michigan 48109, United States
2. Department of Internal Medicine, University of Michigan, Ann Arbor, Michigan 48109, United States
3. Program in Chemical Biology, University of Michigan, Ann Arbor, Michigan 48109, United States
4. Department of Pharmacology, University of Michigan, Ann Arbor, Michigan 48109, United States
5. Department of Medicinal Chemistry, University of Michigan, Ann Arbor, Michigan 48109, United States