MATERIAL AND METHODS
As previously described,The eligibility criteria are described in detail in our previous report.Overall, 550 patients (275 per arm)Only data for OS were analyzed through to the cutoff date of February 10, 2021 (minimum follow‐up, 19.4 months) using the intention‐to‐treat analysis set. We used the Kaplan–Meier analysis method to estimate the OS and the Brookmeyer–Crowley method with double‐log transformation was used to calculate 95% confidence intervals (CIs). For subgroup analyses, the Cox proportional hazards model was utilized to calculate unstratified HRs (together with the 95% CIs).