The announcement that AstraZeneca PLC’s head and neck cancer program for durvalumab and durvalumab/tremelimumab has been placed on a clinical hold by the FDA has raised concerns about the additive toxicity of immuno-oncology combinations, which have been the focus of development across the industry.
AstraZeneca announced Oct. 27 that FDA had placed a “partial clinical hold on the enrollment of new patients with head...






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