1. Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden
2. Stockholm Center for Public Health, Stockholm, Sweden
3. Epidemiology and Public Health Unit, Queensland Institute of Medical Research, Brisbane, Australia
4. Department of Epidemiology, School of Public Health, University of California at Los Angeles, Los Angeles, California, USA
5. Department of Epidemiology, School of Public Health, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA
6. Section of Epidemiology, Institute of Cancer Research, Sutton, Surrey, United Kingdom