Sentence: Nine patients received a combination of cisplatin and etoposide ( EP ) , 5 had cyclophosphamide , doxorubicin and vincristine , 1 had cyclophosphamide , etoposide and vincristine and 1 had monotherapy with oral etoposide .
Drug combination annotation:
[{'class': 'COMB', 'spans': ['cisplatin', 'etoposide'], 'is_context_needed': True}, {'class': 'COMB', 'spans': [2, 3, 4], 'is_context_needed': True}, {'class': 'COMB', 'spans': [5, 6, 7], 'is_context_needed': True}]