Ebi N, Tokunaga S, Itoh K, Okamoto I, Edakuni N, Fujii S, Watanabe K, Hayashi S, Maeyama T, Nakanishi Y. Multicenter cooperative observational study of idiopathic pulmonary fibrosis with non-small cell lung cancer. World J Respirol 2016; 6(1): 42-48 [DOI: 10.5320/wjr.v6.i1.42]