Sentence: This study was conducted to test the feasibility of reducing the interval between cycles of doxorubicin , cyclophosphamide , etoposide ( ACE ) chemotherapy to 2 weeks , thereby increasing dose intensity , by adding granulocyte colony-stimulating factor ( G-CSF ) to reduce the duration of neutropenia following a cycle .
Drug combination annotation:
[{'class': 'POS', 'spans': ['doxorubicin', 'cyclophosphamide', 'etoposide', 'G-CSF'], 'is_context_needed': True}]