1. Department of Bioengineering, University of California, San Diego, La Jolla, CA, USA.
2. Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, CA, USA.
3. Department of Molecular and Cellular Neuroscience, Dorris Neuroscience Center, The Scripps Research Institute, La Jolla, CA, USA.
4. Biomedical Sciences Graduate Program, University of California, San Diego, La Jolla, CA, USA.
5. Illumina, San Diego, CA, USA.