Cyclophosphamide for the treatment of progressive low-grade-astrocytoma: A pediatric oncology group phase II study. - Kadota ,R.P.; Kun ,L.E.; Langston ,J.W.; Burger ,P.C.; Cohen ,M.E.; Mahoney ,D.H.; Walter ,A.W.; Rodman ,J.H.; Parent ,A.; Buckley ,E.; Kepner ,J.L.; Friedman ,H.S. (J Pediatr Hematology/Oncology, 1999)