About the Authors

Patricia S. Fontela

Affiliations Department of Epidemiology, Biostatistics, and Occupational Health, McGill University, Montreal, Quebec, Canada, Department of Pediatrics, The Montreal Children's Hospital – McGill University, Montreal, Quebec, Canada

Caroline Quach

Affiliations Department of Epidemiology, Biostatistics, and Occupational Health, McGill University, Montreal, Quebec, Canada, Department of Pediatrics, The Montreal Children's Hospital – McGill University, Montreal, Quebec, Canada

David Buckeridge

Affiliation Department of Epidemiology, Biostatistics, and Occupational Health, McGill University, Montreal, Quebec, Canada

Madukhar Pai

Affiliation Department of Epidemiology, Biostatistics, and Occupational Health, McGill University, Montreal, Quebec, Canada

Robert W. Platt

robert.platt@mcgill.ca

Affiliations Department of Epidemiology, Biostatistics, and Occupational Health, McGill University, Montreal, Quebec, Canada, Department of Pediatrics, The Montreal Children's Hospital – McGill University, Montreal, Quebec, Canada

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: PSF CQ RP. Performed the experiments: PSF. Analyzed the data: PSF RWP. Wrote the paper: PSF RWP CQ MP DB. Critical review: CQ RWP DB MP. Obtained permission to use the SPIN database: CQ.