About the Authors
Division of Social Medicine, Department of Public Health Sciences, Karolinska Institutet, Stockholm, Sweden
Division of Epidemiology, Department of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden
The authors have declared that no competing interests exist.
Conceived and designed the experiments: OAU. Performed the experiments: OAU. Analyzed the data: OAU TM LS. Contributed reagents/materials/analysis tools: OAU TM LS. Wrote the paper: OAU TM LS.