[1] Brighton & Sussex Med Sch, Dept Primary Care & Publ Hlth, Brighton, E Sussex, England
[2] Sussex Partnership NHS Fdn Trust, Res & Dev Dept, Brighton, E Sussex, England
[3] Brighton & Sussex Clin Trials Unit, Brighton, E Sussex, England
[4] Brighton & Sussex Med Sch, Dept Clin & Expt Med, Brighton, E Sussex, England
[5] Brighton & Sussex Univ Hosp Trust, Dept Gastroenterol & Hepatol, Brighton, E Sussex, England
[6] Kings Coll London, Cicely Saunders Inst, Dept Palliat Care Policy & Rehabil, London, England
[7] Sussex Community NHS Fdn Trust, Brighton, E Sussex, England
[8] Western Sussex NHS Fdn Trust, Dept Gastroenterol & Hepatol, Worthing, England
[9] Brighton & Sussex Univ Hosp Trust, Dept Palliat Med, Brighton, E Sussex, England