CD274 and lung cancer: Lantuejoul Lantuejoul S S Sound-Tsao Sound-Tsao M M Cooper Cooper WA WA PD-L1 testing for lung cancer in 2019: perspective from the IASLC Pathology Committee PD-L1 testing for lung cancer in 2019: perspective from the IASLC Pathology Committee J Thorac Oncol J Thorac Oncol 2020 2020 15 15 499 499 519 519 10.1016/j.jtho.2019.12.107 10.1016/j.jtho.2019.12.107 31870882 31870882