[1] UCL, Res Dept Clin Educ & Hlth Psychol, London, England
[2] Univ Greenwich, Ctr Chron Illness & Ageing, Sch Human Sci, London, England
[3] Univ Hull, Fac Hlth Sci, Kingston Upon Hull, N Humberside, England
[4] North East London Fdn Trust, Res & Dev Dept, London, England