[1] Univ Teesside, Inst Hlth & Social Care, Middlesbrough, Cleveland, England
[2] Univ Dundee, Ninewells Hosp & Med Sch, Dundee DD1 4HN, Scotland
[3] Northumbria Univ, Sch Hlth Community & Educ Studies, Newcastle Upon Tyne NE1 8ST, Tyne & Wear, England
[4] Univ Aberdeen, Sch Med & Dent, Aberdeen AB9 1FX, Scotland
[5] Univ Greenwich, Sch Hlth & Social Care, London SE18 6PF, England