Sentence: In both cases , chemotherapy comprising rituximab + dose-adjusted EPOCH regimen ( etoposide , prednisone , vincristine , cyclophosphamide and doxorubicin ) was administered .
Drug combination annotation:
[{'class': 'POS', 'spans': ['rituximab', 'etoposide', 'prednisone', 'vincristine', 'cyclophosphamide', 'doxorubicin'], 'is_context_needed': True}]