A phase II window trial of procarbazine and topotecan in children with high-grade glioma: A report from the children's oncology group

Murali M. Chintagumpala, Henry S. Friedman, Clinton F. Stewart, James Kepner, Roger E. McLendon, Paul L. Modrich, Charles McCluggage, Peter Burger, Emi Holmes, Stephen Thompson, James Rutka, Jeff Michalski, Shiao Woo, Susan M. Blaney, Larry E. Kun, Marc E. Horowitz