About the Authors

Maria B. Ospina

Affiliation School of Public Health, University of Alberta, Edmonton, Alberta, Canada

Don Voaklander

Affiliation School of Public Health, University of Alberta, Edmonton, Alberta, Canada

Ambikaipakan Senthilselvan

Affiliation School of Public Health, University of Alberta, Edmonton, Alberta, Canada

Michael K. Stickland

Affiliation Division of Pulmonary Medicine, Faculty of Medicine & Dentistry, University of Alberta, Edmonton, Alberta, Canada

Malcolm King

Affiliation Faculty of Health Sciences; Simon Fraser University, Vancouver, British Columbia, Canada

Andrew W. Harris

Affiliation Alberta Health, Edmonton, Alberta, Canada

Brian H. Rowe

brian.rowe@ualberta.ca

Affiliations School of Public Health, University of Alberta, Edmonton, Alberta, Canada, Division of Pulmonary Medicine, Faculty of Medicine & Dentistry, University of Alberta, Edmonton, Alberta, Canada, Department of Emergency Medicine, Faculty of Medicine & Dentistry, University of Alberta, Edmonton, Alberta, Canada

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Analyzed the data: MBO AS. Wrote the paper: MBO. Contributed to study conception and design: MBO DV AS MKS MK BHR. Contributed to acquisition of data: MO DV AH BR. Interpreted data: MBO DV AS MKS MK AH BHR. Contributed to revisions of manuscript: MBO DV AS MKS MK AH BHR.