About the Authors

Thomas Frisell

Thomas.Frisell@ki.se

Affiliations Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden, Centre for Violence Prevention, Karolinska Institutet, Stockholm, Sweden

Yudi Pawitan

Affiliation Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden

Niklas Långström

Affiliations Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden, Centre for Violence Prevention, Karolinska Institutet, Stockholm, Sweden

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Analyzed the data: TF. Contributed reagents/materials/analysis tools: NL. Wrote the paper: TF NL YP. Planned the study: TF YP NL.