[1] Univ Leeds, St Jamess Univ Hosp, Leeds Inst Med Res St James, Patient Centred Outcomes Res Grp, Leeds, England
[2] Univ Leeds, Leeds Inst Hlth Sci, Acad Unit Hlth Econ, Leeds, England
[3] Univ Leeds, Leeds Inst Med Res St Jamess, Leeds Canc Ctr, Dept Clin Oncol, Leeds, England
[4] St James Univ Hosp, Patient Centred Outcomes Res Grp, Level 5,Clin Sci Bldg,Beckett St, Leeds LS9 7TF, England