Induction regimens: TP (docetaxel 75 mg/m²; cisplatin 75 mg/m²) Q3w, TPF (docetaxel 60 mg/m²; cisplatin 60 mg/m²; 5-fluorouracil 600-750 mg/m² per day, continuous intravenous infusion d1-5) Q3w, or GP (gemcitabine: 1000 mg/m2 d1, d8; cisplatin 80 mg/m2) Q3w.

Defined as the time from randomization to tumor recurrence, distant metastasis, or death due to any reason, whichever occurs first. Patients who withdraw or who are lost to follow-up will be censored at the date last known to be alive and progression free. Patients not having an event will be censored at the date last seen alive.

Defined as the time from randomization until death from any cause. Patients who withdraw or who are lost to follow-up will be censored at the date last known to be alive. Patients remaining alive throughout the duration of the study will have their survival time censored on the date last seen alive.