Phase 1b/2 Study of LDRT in Combination With AK104 Plus Chemotherapy as First-line Treatment for ES-SCLC

IV infusion

Etoposide intravenous infusion was administered at a dose of 100 mg/m\^2 on Days 1, 2, and 3 of each 21-day cycle during the induction phase (Cycles 1-4).

Carboplatin intravenous infusion to achieve an initial target AUC of 5 mg/mL/min was administered on Day 1 of each 21-day cycle during the induction phase (Cycles 1-4).

"The subjects will receive LDRT, from C1D1-C1D5, once a day for 3Gy, until the target dose of 15Gy is achieved (Cycles 1).~LDRT treatment for primary/mediastinal positive lymph nodes/metastatic lesions during maintenance therapy (C1D1-C1D5, 15Gy)."