1. Department of Bioengineering, Stanford University, Stanford, CA 94305, USA.
2. Department of Molecular Biology and Genetics, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA.
3. Biochemistry, Cellular, and Molecular Biology Graduate Program, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA.
4. Department of Chemical and Systems Biology, Stanford University, Stanford, CA 94305, USA.
5. Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA.