<qa>  What is the doxorubicin dose in EPOCH-based chemotherapy?Left ventricular ejection fraction greater than 45 by either MUGA or 2-D echo, obtained within 28 days of enrollment. The cumulative dose of doxorubicin received by patients will not be considered, as the cardiac ejection fraction appears to indicate the safe cumulative doxorubicin dose in the setting of EPOCH-based chemotherapy. 