Keiki Yokoo, Masanori Shiratori, Kimiyuki Ikeda, Yasuaki Umeda, Mitsuo Otsuka, Hirotaka Nishikiori, et al. Significance of Combined Emphysema in Idiopathic Pulmonary Fibrosis and Serum Surfactant Protein-D as a Prognostic Factor. Pulmonary Research and Respiratory Medicine – Open Journal [Internet]. 2017 Mar. 3 [cited 2026 Sep. 6];4(2):24-32. Available from: https://openventio.us/index.php/PRRM/article/view/2161