[1] Great Ormond St Hosp Children NHS Fdn Trust, Ctr Outcomes & Experience Res Childrens Hlth Illn, London, England
[2] Great Ormond St Hosp Children NHS Fdn Trust, Cardiac Intens Care Unit, London, England
[3] Great Ormond St Hosp Children NHS Fdn Trust, Paediat Intens Care Unit, London, England
[4] Imperial Coll Healthcare NHS Trust, Paediat Intens Care Unit, London, England
[5] Univ Cambridge, Dept Paediat, Cambridge, England
[6] Imperial Coll London, Ctr Psychiat, London, England
[7] Great Ormond St Hosp Children NHS Fdn Trust, Crit Care Div, Cats, London, England