When is a high-grade astrocytoma (HGA) not a HGA? - Boyett,J.; Yates,A.; Gilles,F. (<~>Results of a central review of 226 cases of anaplastic astrocytoma (AA), glioblastoma multiforme (GBM), and other-HGA (OTH-HGA) by five neuropathologists. Proc Am Soc Clin Oncol, 1998)