1 Epigenetics Program, Department of Cell and Developmental Biology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA.
2 Department of Biology, University of Pennsylvania, Philadelphia, PA, USA.
3 Department of Pathology & Laboratory Medicine, University of Pennsylvania, Philadelphia, PA, USA.
4 Department of Pathology, Drexel University College of Medicine, Philadelphia, PA, USA.
5 Department of Pathology & Laboratory Medicine, University of Pennsylvania, Philadelphia, PA, USA. johnsonb@pennmedicine.upenn.edu.
6 Department of Biology, University of Pennsylvania, Philadelphia, PA, USA. nbonini@sas.upenn.edu.
7 Epigenetics Program, Department of Cell and Developmental Biology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA. bergers@pennmedicine.upenn.edu.
In the version of this article initially published online, the fifth author's name was given as Alexander Amlie-Wolf. The correct name is Alexandre Amlie-Wolf. The error has been corrected in the print, PDF and HTML versions of this article.