[1] City Univ London, St Bartholomew Sch Nursing & Midwifery, Publ Hlth & Primary Care Unit, London, England
[2] Univ Leeds, Sch Healthcare Studies, Leeds LS2 9LN, W Yorkshire, England
[3] Hull Royal Infirm, Hull & E Yorkshire NHS Trust, Kingston Upon Hull, N Humberside, England
[4] Univ Sheffield, No Gen Hosp, Sheffield, S Yorkshire, England
[5] Univ Manchester, Manchester, Lancs, England
[6] Hull & E Riding Community Hlth NHS Trust, Kingston Upon Hull, N Humberside, England
[7] Drs Price Roper Curron & McDairmid, Kingston Upon Hull, N Humberside, England
[8] Univ York, Dept Hlth Sci, York YO10 5DQ, N Yorkshire, England