Sokai, A., T. Handa, T. Oga, K. Tanizawa, K. Ikezoe, Y. Nakatsuka, T. Kubo, K. Kanatani, K. Chin, and M. Mishima. “The Association Between Health-Related Quality of Life and Disease Progression in Idiopathic Pulmonary Fibrosis: A Prospective Cohort Study”. Sarcoidosis, Vasculitis and Diffuse Lung Diseases, vol. 34, no. 3, Jan. 2018, pp. 226-35, doi:10.36141/svdld.v34i3.5214.