1 Centre for Heart, Lung and Vascular Health, University of British Columbia, Kelowna, British Columbia, Canada. Electronic address: [email protected].
2 Division of Cardiology, University of British Columbia, Vancouver, British Columbia, Canada.
3 Institute of Medical Science, University of Toronto, Toronto, Ontario, Canada; Division of Respirology, Sinai Health System/University Health Network, Toronto, Ontario, Canada.
4 Institute of Medical Science, University of Toronto, Toronto, Ontario, Canada; Division of Cardiology, Sinai Health System/University Health Network, Toronto, Ontario, Canada.