About the Authors

Sarka Lisonkova

slisonkova@bcchr.ca

Affiliation Department of Obstetrics and Gynaecology, University of British Columbia, Vancouver, British Columbia, Canada

Michael S. Kramer

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

Competing Interests

The authors have declared that no competing interests exist.