[BMJ Publishing Group Ltd and British Thoracic Society British Thoracic Society Winter Meeting 2017, QEII Centre Broad Sanctuary Westminster London SW1P 3EE, 6 to 8 December 2017, Programme and Abstracts - ()] Idiopathic pulmonary fibrosis treatment update - M30 Effect of dose reductions and/or interruptions on the efficacy of nintedanib in patients with idiopathic pulmonary fibrosis (ipf): subgroup analysis of the inpulsis trials