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    A study of atezolizumab plus tiragolumab and atezolizumab plus placebo as first-line treatment in patients with recurrent/metastatic PD-L1 positive squamous cell carcinoma of the head and neck

    A Study of Atezolizumab Plus Tiragolumab and Atezolizumab Plus Placebo as First-Line Treatment in Participants With Recurrent/Metastatic PD-L1 Positive Squamous Cell Carcinoma of the Head and Neck

    • Cancer
    • Head and Neck Cancer
    • Squamous Cell Carcinoma
    • Squamous Cell Carcinoma of the Head and Neck (SCCHN)