Sentence: The patient was treated with a combination of cyclophosphamide , doxorubicin , vincristine , and prednisone as initial management immediately after diagnosis .
Drug combination annotation:
[{'class': 'POS', 'spans': ['cyclophosphamide', 'doxorubicin', 'vincristine', 'prednisone'], 'is_context_needed': True}]