As shown in Table 1 and Supplementary Table 2, patient characteristics such as age, gender, smoking history, histology, performance status (PS) scores, and disease stage were similar across different ALK fusion groups, with majorities of the ALK-positive patients in our cohort were never smokers (81.6%) with lung adenocarcinoma (ADC; 96.0%). Here, ALK is linked to lung adenocarcinoma.