[1] Univ Sheffield, Sch Hlth & Related Res, Sheffield S10 2TN, S Yorkshire, England
[2] Univ Warwick, Warwick Med Sch, Coventry CV4 7AL, W Midlands, England
[3] Univ Nottingham, Sch Hlth Sci, Nottingham NG7 2RD, England
[4] Univ Sheffield, Sch Nursing & Midwifery, Sheffield S10 2TN, S Yorkshire, England
[5] Univ Sheffield, Dept Oncol, Sheffield S10 2TN, S Yorkshire, England
[6] Coventry & Warwickshire Partnership NHS Trust, Coventry, W Midlands, England
[7] Univ Warwick, Warwick Med Sch, RCN Res Inst, Coventry CV4 7AL, W Midlands, England
[8] Warwick Med Sch, Div Hlth Sci, Coventry, W Midlands, England