Department of Bioengineering, Stanford University, Stanford, CA, USA. Department of Cell and Tissue Biology, University of California, San Francisco, San Francisco, CA, USA. Department of Chemical and Systems Biology, Stanford University School of Medicine, Stanford, CA, USA. Chan Zuckerberg Biohub, Stanford, CA, USA. Department of Bioengineering, Stanford University, Stanford, CA, USA. kchuang@stanford.edu. Chan Zuckerberg Biohub, Stanford, CA, USA. kchuang@stanford.edu. Department of Microbiology and Immunology, Stanford University School of Medicine, Stanford, CA, USA. kchuang@stanford.edu.