[1] Glasgow Caledonian Univ, Inst Appl Hlth Res, Glasgow, Lanark, Scotland
[2] Sherwood Forest Hosp, Mansfield, England
[3] Kings Coll Hosp London, Integrated Care, London, England
[4] Univ Manchester, Sch Nursing Midwifery & Social Work, Manchester, Lancs, England
[5] Imperial Coll London, Resp Med, NHLI, London, England