Sentence: Ifosfamide at 12 g/m2 was administered by intravenous continuous infusion over 3 days , and doxorubicin 60 mg/m2 was administered as an intravenous bolus injection on day 1 .
Drug combination annotation:
[{'class': 'POS', 'spans': ['Ifosfamide', 'doxorubicin'], 'is_context_needed': True}]