Effect of continued treatment with pirfenidone following a clinically meaningful decline in percent predicted forced vital capacity in patients with idiopathic pulmonary fibrosis (IPF) - Costabel, U; Nathan, SD; Albera, C; Bradford, WZ; Fagan, EA; Glaspole, I; Glassberg, MK; King, TE; Lancaster, L; Lederer, DJ; Lin, Z; Pereira, CA; Swigris, JJ; Valeyre, D; Noble, PW (Pneumologie, 2016)