[1] Dept Med, Calgary, AB, Canada
[2] Mt Royal Univ, Dept Biol, Calgary, AB, Canada
[3] Univ British Columbia, Vancouver, BC, Canada
[4] Univ British Columbia, Dept Radiol, Calgary, BC, Canada
[5] St James Hosp, Dept Radiol, Dublin, Ireland
[6] Vancouver Gen Hosp, Pathol, Vancouver, BC, Canada
[7] McMaster Univ, Dept Radiol, Hamilton, ON, Canada
[8] Univ Montreal, Dept Radiol, Montreal, PQ, Canada
[9] St Josephs Hlth Care, Hamilton, ON, Canada
[10] Univ Montreal, Montreal, PQ, Canada
[11] Univ Calgary, Dept Radiol, Calgary, AB, Canada
[12] Univ British Columbia, Dept Med, Vancouver, BC, Canada
[13] Univ Hlth Network, Toronto, ON, Canada
[14] Univ Saskatchewan, Dept Med Imaging, Saskatoon, SK, Canada
[15] Univ Pittsburgh, Div Pulm Allergy & Crit Care Med, Pittsburgh, PA USA
[16] McMaster Univ, Respirol, Hamilton, ON, Canada
[17] McMaster Univ, Hamilton, ON, Canada
[18] Univ Saskatchewan, Saskatoon, SK, Canada
[19] Univ Toronto, Dept Med Imaging, Toronto, ON, Canada
[20] CHUM, Med, Montreal, PQ, Canada
[21] Univ Saskatchewan, Dept Med, Saskatoon, SK, Canada
[22] Ctr Hosp Univ Montreal, Montreal, PQ, Canada
[23] Univ Toronto, Med, Toronto, ON, Canada
[24] Univ Toronto, Dept Med, Toronto, ON, Canada
[25] Ctr Heart Lung Innovat, Vancouver, BC, Canada
[26] McGill Univ, Dept Med, Montreal, PQ, Canada
[27] Univ Calgary, Med, Calgary, AB, Canada