1. Department of Cell and Tissue Biology, University of California, San Francisco, San Francisco, CA 94143, USA.
2. Department of Pharmaceutical Chemistry, University of California, San Francisco, San Francisco, CA 94143, USA.
3. Department of Bioengineering and Therapeutic Sciences, University of California, San Francisco, San Francisco, CA 94143, USA.
4. Quantitative Biosciences Institute, University of California, San Francisco, San Francisco, CA 94143, USA.
5. Institute for Human Genetics, University of California, San Francisco, San Francisco, CA 94143, USA.