About the Authors

Richard Long

richard.long@ualberta.ca

Affiliations Faculty of Medicine and Dentistry, Department of Medicine, University of Alberta, Edmonton, Alberta, Canada, School of Public Health, University of Alberta, Edmonton, Alberta, Canada

Courtney Heffernan

Affiliation Faculty of Medicine and Dentistry, Department of Medicine, University of Alberta, Edmonton, Alberta, Canada

Zhiwei Gao

Affiliation Clinical Epidemiology Unit, Department of Medicine, Memorial University, St. John’s, Newfoundland, Canada

Mary Lou Egedahl

Affiliation Faculty of Medicine and Dentistry, Department of Medicine, University of Alberta, Edmonton, Alberta, Canada

James Talbot

Affiliations School of Public Health, University of Alberta, Edmonton, Alberta, Canada, Alberta Health Province of Alberta, Edmonton, Alberta, Canada

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: RL CH. Performed the experiments: RL CH ZG ME JT. Analyzed the data: RL CH ZG ME. Contributed reagents/materials/analysis tools: RL CH ZG ME JT. Wrote the paper: RL CH ZG ME JT. Obtained ethics approvals and administrative approvals for the study: CH.