1. Department
of Chemistry and Chemical Biology, Harvard University, 12 Oxford
Street, Cambridge, Massachusetts 02138, United States
2. Society
of Fellows, Harvard University, 78 Mount Auburn Street, Cambridge, Massachusetts 02138, United States
3. Department
of Internal Medicine, University of Michigan Comprehensive Cancer Center, 1500 E. Medical Center Drive, Ann Arbor, Michigan 48103, United States
4. Department
of Pharmacology, University of Michigan Medical School, 1150
W. Medical Center Drive, Ann Arbor, Michigan 48109, United States