1. Cardiovascular Research Institute & Department of Physiology (A.Y.P., Xi Chen, K.H., Xiaoxin Chen, A.H., S.K., N.P., L.C., R.B.B., J.L., G.N.H.), University of California, San Francisco.
2. Eli and Edythe Broad Center for Regeneration Medicine and Stem Cell Research (A.Y.P., Xi Chen, K.H., Xiaoxin Chen, A.H., S.K., N.P., L.C., R.B.B., J.L., G.N.H.), University of California, San Francisco.
3. Department of Biological Sciences, San Jose State University, CA (A.Y.P.).
4. Epigenetics and Stem Cell Biology Laboratory, National Institute of Environmental Health Sciences, Research Triangle Park, NC (H.Y., J.W., Q.C., G.H.).