[1] Univ Nottingham, Evidence Based Child Hlth Grp, Div Child Hlth Obstet & Gynaecol, Queens Med Ctr, E Floor East Block, Nottingham, England
[2] Univ Nottingham, Fac Med & Hlth Sci, Nottingham, England
[3] UCL Great Ormond St Inst Child Hlth, London, England
[4] York Teaching Hosp NHS Fdn, Dept Physiotherapy, York Hull Adult Cyst Fibrosis Unit, York, N Yorkshire, England
[5] Univ Leeds, Leeds, W Yorkshire, England
[6] Cyst Fibrosis Trust, London, England