[1] Pontificia Univ Catolica Chile, Fac Med, Dept Ciencias Salud, Santiago, Chile
[2] Pontificia Univ Catolica Chile, Dept Ciencias Salud, Cardioresp Res Lab CREAR, Santiago, Chile
[3] Toronto Gen Hosp Res Inst, Toronto, ON, Canada
[4] Univ Toronto, Dept Physiol, Toronto, ON, Canada
[5] Univ Toronto, Interdept Div Crit Care Med, Toronto, ON, Canada
[6] Univ Hlth Network, Dept Med, Div Respirol, Toronto, ON, Canada