1. Department of Molecular, Cell, and Developmental Biology, University of California, Los Angeles, Los Angeles, CA 90095
2. Department of Medicine, University of California, Los Angeles, Los Angeles, CA 90095
3. Department of Pathology and Laboratory Medicine, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, CA 90095
4. Howard Hughes Medical Institute, Los Angeles, CA 90095
5. Molecular Biology Institute, University of California, Los Angeles, Los Angeles, CA 90095