[1] Univ Texas MD Anderson Canc Ctr, Dept Neurooncol, Brain Tumor Ctr, Houston, TX 77030 USA
[2] Univ Penn, Epigenet Inst, Philadelphia, PA 19104 USA
[3] Univ Penn, Dept Cell & Mol Biol, Philadelphia, PA 19104 USA
[4] Univ Penn, Dept Genet, Philadelphia, PA 19104 USA
[5] Univ Penn, Dept Biol, Philadelphia, PA 19104 USA
[6] Univ Texas MD Anderson Canc Ctr, Dept Mol & Cellular Oncol, Houston, TX 77030 USA
[7] Univ Texas Hlth Sci Ctr Houston, MD Anderson Canc Ctr, UTHlth Grad Sch Biomed Sci, Houston, TX 77030 USA