Sentence: Twenty-seven received rituximab mainly in addition to high-dose cytarabine and etoposide ( n = 18 ) and/or ifosfamide , carboplatin , and etoposide ( n = 7 ) .
Drug combination annotation:
[{'class': 'COMB', 'spans': ['rituximab', 'cytarabine', 'etoposide', 'ifosfamide', 'carboplatin', 'etoposide'], 'is_context_needed': True}]