1. Department of Computational and Systems Biology, University of Pittsburgh, Pittsburgh, PA 15232, USA.
2. ATCC Cell Systems, Gaithersburg, MD 20877, USA.
3. Department of Cell Biology, University of Pittsburgh, Pittsburgh, PA 15232, USA.
4. UPMC-Hillman Cancer Center, University of Pittsburgh, Pittsburgh, PA, USA.
5. Department of Physics and Astronomy, University of Pittsburgh, Pittsburgh, PA 15232, USA.