[1] Univ Utrecht, Ctr Med, Pediat Intens Care Unit, Utrecht, Netherlands
[2] Univ Utrecht, Ctr Med, Dept Pediat Immunol, Sect Psychoneuoimmunol, Utrecht, Netherlands
[3] Univ Toronto, Div Resp Med, St Michaels Hosp, Interdept Div Crit Care, Toronto, ON, Canada