Effect of prior chemotherapy regimens on 
In the control group, the median PFS of fluorouracil combined therapy, paclitaxel + platinum therapy and both regimen therapy was 3.95 (95% CI: 2.90–4.50) vs. 3.98 (95% CI: 3.80–4.20) vs. 2.90 (95% CI: 2.20–3.40) months (Figure Effect of prior chemotherapy regimens on PFS and OS was estimated by the Kaplan–Meier method. (A) Effect of prior chemotherapy regimens on PFS in the control group. (B) Effect of prior chemotherapy regimens on OS in the control group. (C) Effect of prior chemotherapy regimens on PFS in the experiment group. (D) Effect of prior chemotherapy regimens on OS in the experiment group.