Department of Medical Oncology, Hospital Universitario 12 de Octubre, H120-CNIO Lung Cancer Unit, Universidad Complutense and Ciberonc, Madrid, Spain. Electronic address: lpazaresr@seom.org. BHI of Omsk Region Clinical Oncology Dispensary, Omsk, Russia. Cancer and Hematology Centers of Western Michigan, Grand Rapids, MI, USA. Asklepios Lung Clinic, Munich-Gauting, Germany. Okayama University Hospital, Okayama, Japan. Odessa National Medical University, Odessa, Ukraine. Omsk Regional Cancer Center, Omsk, Russia. Karl Landsteiner Institute of Lung Research and Pulmonary Oncology, Krankenhaus Nord, Vienna, Austria. Istanbul University-Cerrahpaşa, Cerrahpaşa School of Medicine, Istanbul, Turkey. Samsung Changwon Hospital, Sungkyunkwan University School of Medicine, Changwon, South Korea. Kyiv City Clinical Oncological Centre, Kiev, Ukraine. Petrov Research Institute of Oncology, St Petersburg, Russia. Department of Medical Oncology, Hospital Universitario 12 de Octubre, H120-CNIO Lung Cancer Unit, Universidad Complutense and Ciberonc, Madrid, Spain. AO Ospedali Riuniti PO Vincenzo Cervello, Palermo, Italy. Thomayer Hospital, First Faculty of Medicine, Charles University, Prague, Czechia. Dnipropetrovsk Medical Academy, Dnipro, Ukraine. Tuberculosis and Lung Disease Hospital, Olsztyn, Poland. Semmelweis University, Budapest, Hungary. Clinic of Medical Oncology, UMHAT St Marina, Varna, Bulgaria. AstraZeneca, Cambridge, UK. AstraZeneca, Gaithersburg, MD, USA. David Geffen School of Medicine at UCLA, Los Angeles, CA, USA.