AN OBSERVATIONAL STUDY OF IVACAFTOR IN PATIENTS WITH CYSTIC FIBROSIS (CF) AND SELECTED NON-G551D GATING MUTATIONS: OUTCOMES FROM THE SECOND INTERIM ANALYSIS OF THE VOCAL STUDY - Simmonds,NJ; Castellani,C; Colombo,C; van,der Ent K; Jha,L; DeSouza,C; Thorat,T; Kinnman,N (BMJ PUBLISHING GROUP, 2019)