[1] Univ London, Fac Hlth Social Care & Educ HSCE St Georges, 2nd Floor Grosvenor Wing,Cranmer Terrace, London SW17 0RE, England
[2] Kingston Univ, 2nd Floor Grosvenor Wing,Cranmer Terrace, London SW17 0RE, England
[3] Kings Coll London, Florence Nightingale Fac Nursing & Midwifery, London, England
[4] City Univ London, Sch Hlth Sci, Ctr Hlth Serv Res, London, England
[5] Natl Ctr Smoking Cessat & Training, London, England
[6] Kings Coll London, Florence Nightingale Fac Nursing & Midwifery, Dept Postgrad Res, London, England