Yamaguchi, K.; Tsushima, K.; Kurita, N.; Fujiwara, A.; Soeda, S.; Yamaguchi, A.; Sugiyama, S.; Togashi, Y.; Kono, Y.; Kasagi, S.; Setoguchi, Y. Clinical Characteristics Classified by the Serum KL-6 Level in Patients With Organizing Pneumonia. Sarcoidosis Vasc Diffuse Lung Dis 2013, 30 (1), 43-51.