Sentence: The regimen of gemcitabine combined with ifosfamide and anthracycline is feasible , tolerable and effective in patients with recurrent platinum resistant/refractory epithelial ovarian cancer .
Drug combination annotation:
[{'class': 'POS', 'spans': ['gemcitabine', 'ifosfamide', 'anthracycline'], 'is_context_needed': False}]