MARKED SMALL AIRWAY DYSFUNCTION AND CONSEQUENT AIR-TRAPPING CHARACTERISE CHRONIC HYPERSENSITIVITY PNEUMONITIS (CHP) BUT NOT IDIOPATHIC PULMONARY FIBROSIS (IPF) - Bonini, M; Usmani, O; Pacini, A; Menichini, I; Ward, S; Walsh, S; Daccord, C; Minelli, C; Brunori, M; Wells, AU; Chua, F (BMJ PUBLISHING GROUP, 2017)