Institution: | 1. Department of Molecular Biology and Howard Hughes Medical Institute, Massachusetts General Hospital, Boston, MA 02114, USA;2. Department of Systems Biology, Harvard Medical School, Boston, MA 02115, USA;3. Broad Institute of MIT and Harvard, Cambridge, MA 02142, USA;4. Department of Biology, MIT, Cambridge, MA 02139, USA;5. Department of Cellular and Molecular Medicine, Institute for Genomic Medicine, University of California, San Diego, La Jolla, CA 92093, USA |