Use of nintedanib for the treatment of idiopathic pulmonary fibrosis: multi-centre real life experience in Germany - Bonella, F; Kreuter, M; Hagmeyer, L; Neurohr, C; Milger, K; Keller, C; Kohlhäufl, M; Müller-Quernheim, J; Prasse, A (Pneumologie, 2016)