[1] Oxford Univ Hosp NHS Fdn Trust, Dept Palliat Care, Oxford, England
[2] Newcastle Upon Tyne NHS Hosp Fdn Trust, Hlth Educ England North East, Newcastle Upon Tyne, Tyne & Wear, England
[3] Newcastle Upon Tyne NHS Fdn Trust, Adult Cyst Fibrosis Ctr, Newcastle Upon Tyne, Tyne & Wear, England
[4] Oxford Univ Hosp NHS Fdn Trust, Oxford Adult Cyst Fibrosis Ctr, Oxford, England
[5] Newcastle Upon Tyne NHS Fdn Trust, Dept Palliat Care, Newcastle Upon Tyne, Tyne & Wear, England