OS for patients with gross total disease resection [ Time Frame: From study entry to death due to any cause, assessed up to 5 ... Female patients who are pregnant since fetal toxicities and teratogenic effects have been noted for several of the study drugs ... Overall survival (OS) [ Time Frame: From study entry to death due to any cause, assessed up to 5 years after study enrollment ] ... or death from any cause, assessed up to 5 years after study enrollment ]. For Strata 1-3, the primary analysis of EFS will ...