Zahid Kocak, Mehmet. 2021. “Comment on ‘Impact of Performance Status on Non-Small Cell Lung Cancer Patients With a PD-L1 Tumour Proportion Score ≥50% Treated With Front-Line pembrolizumab’”. Acta Oncologica 60 (4):564-65. https://doi.org/10.1080/0284186X.2021.1889028.