About the Authors
Finnish Institute of Occupational Health, Helsinki, Finland
Wolfson Institute of Preventive Medicine, Queen Mary University of London, London, United Kingdom
Department of Epidemiology, Biostatistics and Occupational Health, McGill University, Montreal, Canada
Department of Epidemiology and Public Health, University College London, London, United Kingdom
School of Community and Social Medicine, University of Bristol, Bristol, United Kingdom
The authors have declared that no competing interests exist.
Conceived and designed the experiments: JEF MK RF MV SAS. Performed the experiments: JEF MK RF MV. Analyzed the data: MV. Contributed reagents/materials/analysis tools: RF JEF SAS. Wrote the paper: MV SAS RF JEF MK.