[1] Glasgow Caledonian Univ, Res Unit, Nursing Midwifery & Allied Hlth Profess, Glasgow G4 0BA, Lanark, Scotland
[2] Univ Stirling, Res Unit, Nursing Midwifery & Allied Hlth Profess, Stirling, Scotland
[3] Univ Glasgow, Nursing & Hlth Care Sch, Sch Med Dent & Nursing, 59 Oakfield Ave,Gilmorehill Campus, Glasgow, Lanark, Scotland
[4] Glasgow Royal Infirm, Dept Care Elderly, 84 Castle St, Glasgow G4 0SF, Lanark, Scotland