Sentence: Thirteen stage III B and 13 stage IV patients received intermediate doses of ifosfamide ( 1000 mg/m2 ) , carboplatin ( 120 mg/m2 ) and etoposide ( 120 mg/m2 ) given intravenously on day 1 to 3 every 4 weeks .
Drug combination annotation:
[{'class': 'POS', 'spans': ['ifosfamide', 'carboplatin', 'etoposide'], 'is_context_needed': True}]