Japanese Ethnicity Compared with Caucasian Ethnicity and Never-Smoking Status Are Independent Favorable Prognostic Factors for Overall Survival in Non-small Cell Lung Cancer: A Collaborative Epidemiologic Study of the National Hospital Organization Study Group for Lung Cancer (NHSGLC) in Japan and a Southern California Regional Cancer Registry Databases - Tomoya Kawaguchi; Akihide Matsumura; Shimao Fukai; Atsuhisa Tamura; Ryusei Saito; Jason A. Zell; Yosihito Maruyama; Argyrios Ziogas; Masaaki Kawahara; Sai‐Hong Ignatius Ou (2010)