1. Department of Cellular and Molecular Pharmacology, University of California, San Francisco, San Francisco, CA 94158, USA.
2. Department of Pediatrics, University of California, San Francisco, San Francisco, CA 94158, USA.
3. Helen Diller Family Comprehensive Cancer Center, University of California, San Francisco, San Francisco, CA 94158, USA.
4. Howard Hughes Medical Institute, University of California, San Francisco, San Francisco, CA 94158, USA.
5. Division of Hematology and Oncology, University of California, San Francisco, San Francisco, CA 94158, USA.
6. Center for Systems and Synthetic Biology, University of California, San Francisco, San Francisco, CA 94158, USA.