Quartile forced vital capacity changes at 3, 6, 9 and 12 months with pirfenidone in patients with Idiopathic Pulmonary Fibrosis: a pooled phase III analysis - Bonella, F; Sussman, R; Ettinger, N; Zisman, D; Trzaskoma, B; Chou, W; Kardatzke, D; Costabel, U (Pneumologie, 2018)