Author information:
(1)Department of Bioengineering, University of Pennsylvania, Philadelphia, PA 
19104, USA; Epigenetics Institute, Perelman School of Medicine, University of 
Pennsylvania, Philadelphia, PA 19104, USA.
(2)Department of Bioengineering, University of Pennsylvania, Philadelphia, PA 
19104, USA; Genomics and Computational Biology Program, Perelman School of 
Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA; Epigenetics 
Institute, Perelman School of Medicine, University of Pennsylvania, 
Philadelphia, PA 19104, USA.
(3)Department of Bioengineering, University of Pennsylvania, Philadelphia, PA 
19104, USA.
(4)The Raymond G. Perelman Center for Cellular and Molecular Therapeutics, The 
Children's Hospital of Philadelphia, Philadelphia, PA 19104, USA; Department of 
Pathology and Laboratory Medicine, The University of Pennsylvania, Philadelphia, 
PA 19104, USA.
(5)Biochemistry and Molecular Medicine, University of California-Davis, 
Sacramento, CA 95616, USA; MIND Institute, UC Davis, Sacramento, CA 95616, USA.
(6)Department of Bioengineering, University of Pennsylvania, Philadelphia, PA 
19104, USA; Epigenetics Institute, Perelman School of Medicine, University of 
Pennsylvania, Philadelphia, PA 19104, USA; Department of Genetics, University of 
Pennsylvania, Philadelphia, PA 19104, USA. Electronic address: 
jcremins@seas.upenn.edu.