1. Department of Bioengineering, University of California, Berkeley, California 94720, United States
2. Innovative Genomics Institute, University of California Berkeley and San Francisco, Berkeley, California 94720, United States
3. Department of Chemical and Biomolecular Engineering, University of California Berkeley, Berkeley, California 94720, United States
4. Department of Molecular and Cell Biology, University of California, Berkeley, California 94720, United States
5. Helen Wills Neuroscience Institute, University of California, Berkeley, California 94720, United States
6. Biological Systems & Engineering Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States