About the Authors

Toomas Timpka

To whom correspondence should be addressed. E-mail: tti@ida.liu.se

Affiliations Section of Social Medicine and Public Health, Department of Health and Society, Linköping University, Linköping, Sweden, Centre for Public Health, Östergötland County Council, Linköping, Sweden

Marianne Angbratt

Affiliations Section of Social Medicine and Public Health, Department of Health and Society, Linköping University, Linköping, Sweden, Centre for Public Health, Östergötland County Council, Linköping, Sweden

Per Bolme

Affiliation Department of Paediatrics, Linköping University Hospital, Linköping, Sweden

Göran Hermansson

Affiliation Department of Paediatrics, Linköping University Hospital, Linköping, Sweden

Anders Häger

Affiliation Department of Paediatrics, Linköping University Hospital, Linköping, Sweden

Lars Valter

Affiliation Centre for Public Health, Östergötland County Council, Linköping, Sweden

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: TT MA PB GH AH LV. Performed the experiments: TT. Analyzed the data: TT LV. Contributed reagents/materials/analysis tools: TT MA PB GH. Wrote the paper: TT PB AH LV. Other: All authors approved the version to be published. TT is the guarantor.