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)