[1] Great Ormond St Hosp Sick Children, London WC1N 3JH, England
[2] Inst Child Hlth, Ctr Nursing & Allied Hlth Profess Res, London, England
[3] Kings Coll London, Florence Nightingale Sch Nursing & Midwifery, London WC2R 2LS, England
[4] Ctr Nursing & Allied Hlth Profess Res, Inst Child Hlth, London, England
[5] London S Bank Univ, London, England
[6] Great Ormond St Hosp Sick Children, London WC1N 3JH, England