Sintilimab Plus R-GemOx as Second-line Salvage Therapy in Patients With R/R DLBCL

"Patients receive sintiliman+R-GemOx three weeks for a cycle, detailed as follows:~Combination therapy~* Anti-PD-1 antibody (sintilimab): Fixed dose of 200 mg every 3 weeks, d0, intravenous drip (without pretreatment), infusion time: 30 mintutes (no less than 20 mins, no more than 60 mins), for 4 cycles~* R-GemOx: Rituximab 375mg/m2, d1; Gemcitabine 1000mg, d2; Oxaliplatin 100mg/m2, d2; every 3 weeks for a cycle, 4 cycle as protocol specified.~Monotherapy:~-Anti-PD-1 antibody (sintilimab): Fixed dose of 200 mg every 3 weeks, d0, intravenous drip (without pretreatment), infusion time: 30 mintutes (no less than 20 mins, no more than 60 mins), for 8 cycles"