[1] Univ Toronto, Toronto Western Hosp, Mt Sinai Hosp, Toronto Scleroderma Program, Toronto, ON, Canada
[2] Toronto Gen Hosp, Univ Hlth Network, Div Respirol, Pulm Hypertens Program, Toronto, ON, Canada
[3] Toronto Gen Hosp, Univ Hlth Network, Div Crit Care Med, Pulm Hypertens Program, Toronto, ON, Canada
[4] Toronto Gen Hosp, Mt Sinai Hosp,Toronto Western Hosp, Toronto Scleroderma Program,Pulm Hypertens Progra, Div Rheumatol,Univ Hlth Network,Div Respirol, Toronto, ON, Canada
[5] Toronto Gen Hosp, Mt Sinai Hosp,Toronto Western Hosp, Toronto Scleroderma Program,Pulm Hypertens Progra, Div Rheumatol,Univ Hlth Network,Div Crit Care Med, Toronto, ON, Canada