Fig. 1From: New insights into the biology and development of lung cancer in never smokers—implications for early detection and treatmentGlobal variation in proportions of lung adenocarcinoma patients who are never smokers stratified by sex. Data from studies working with national and regional hospital registries that explicitly reported lung adenocarcinoma or lung cancer histology, smoking status, and sex [11,12,13,14,15,16,17,18,19]. US United StatesBack to article page