[1] Univ Sheffield, Dept Oncol & Metab, Sheffield, S Yorkshire, England
[2] Univ Liverpool, Palliat Care Unit, Liverpool, Merseyside, England
[3] Univ Liverpool, Dept Biostat, Liverpool, Merseyside, England
[4] Univ Liverpool, Dept Psychol, Liverpool, Merseyside, England
[5] Univ Oxford, Dept Psychiat, Oxford, England