WS9.5 Saline at lower tonicity in cystic fibrosis (SALTI-CF) trial − A randomised, controlled trial comparing 0.9% v 3% v 6% nebulised saline T. Dwyer1,2, M. Elkins1,2, R. Dentice1,2,3, S. Forbes4, M. Mcarthur4, P. Cooper4, A. Jaffe5,6, P. Middleton1,7, P. Wark8, P. Bye1,2, SALTI-CF Study Group. 1University of Sydney, Sydney Medical School, Sydney, Australia; 2Royal Prince Alfred Hospital, Respiratory Medicine, Sydney, Australia; 3Royal Prince Alfred Hospital, Physiotherapy, Sydney, Australia; 4Children’s Hospital Westmead, Respiratory Medicine, Sydney, Australia; 5University of New South Wales, School of Women’s and Children’s Health, Sydney, Australia; 6Sydney Children’s Hospital, Respiratory Medicine, Sydney, Australia; 7Westmead Hospital, Respiratory Medicine, Sydney, Australia; 8John Hunter Hospital, Respiratory Medicine, Newcastle, Australia