1. Department of Neurological Surgery, University of Pittsburgh, Pittsburgh, Pennsylvania, USA.
2. John G. Rangos Sr. Research Center, UPMC Children's Hospital of Pittsburgh, Pittsburgh, Pennsylvania, USA.
3. Department of Neurosurgery, Xiangya Hospital, Central South University, Changsha, China.
4. Hunan International Scientific and Technological Cooperation Base of Brain Tumor Research, Changsha, China.
5. Cancer Biology Program, UPMC Hillman Cancer Center, Pittsburgh, Pennsylvania, USA.