Sentence: Treatment of patients over 50 years of age with acute myelogenous leukemia with a combination of rubidazone and cytosine arabinoside , vincristine , and prednisone ( ROAP ) .
Drug combination annotation:
[{'class': 'POS', 'spans': ['rubidazone', 'cytosine arabinoside', 'vincristine', 'prednisone'], 'is_context_needed': True}]