 CAMBRIDGE, Mass. BEIJING--BUSINESS WIRE--- BGNE BTKi--BeiGene, Ltd. NASDAQ: BGNE; HKEX: 06160, a global biotechnology company focused on developing and commercializing innovative medicines worldwide, today announced that the Phase 3 RATIONALE 309 trial of its anti-PD-1 antibody tislelizumab combined with chemotherapy versus placebo combined with chemotherapy as a first-line treatment for patients with recurrent or metastatic nasopharyngeal cancer NPC met its primary endpoint of progression-free surv 