1. Departments of Paediatrics and of Social Preventive Medicine, University of Montreal, Quebec; Research Centre, CHU Ste-Justine, Montreal, Quebec; Department of Epidemiology, Biostatistics and Occupational Health, McGill University Health Centre
Montreal, QuebecCanada
2. Research Institute, Montreal Children’s Hospital of the McGill University Health Centre
Montreal, QuebecCanada
3. Department of Pediatrics, Montreal Children’s Hospital, McGill University Health Centre
Montreal, QuebecCanada
4. Research Centre, CHU Ste-Justine
Montreal, QuebecCanada
5. Department of Paediatrics, Montreal Children’s Hospital, McGill University Health Centre
Montreal, QuebecCanada