About the Authors

Martin Feller

Contributed equally to this work with: Martin Feller, Martin Adam

Affiliation Institute of Social and Preventive Medicine, University of Bern, Bern, Switzerland

Martin Adam

Contributed equally to this work with: Martin Feller, Martin Adam

Affiliations Institute of Social and Preventive Medicine, University of Bern, Bern, Switzerland, Swiss Tropical and Public Health Institute, Department of Epidemiology and Public Health, Basel, Switzerland, University of Basel, Basel, Switzerland

Marcel Zwahlen

Affiliation Institute of Social and Preventive Medicine, University of Bern, Bern, Switzerland

Pierluigi Brazzola

Affiliation Ospedale Regionale di Bellinzona e Valli–Bellinzona, Bellinzona, Switzerland

Felix Niggli

Affiliation Pediatric Oncology Unit, University Children's Hospital Zürich, Zürich, Switzerland

Claudia Kuehni

kuehni@ispm.unibe.ch

Affiliation Institute of Social and Preventive Medicine, University of Bern, Bern, Switzerland

for the Swiss Pediatric Oncology Group (SPOG) and the Swiss National Cohort (SNC)

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: MF MA CEK. Performed the experiments: MF MA. Analyzed the data: MF MA MZ PB FKN CEK. Contributed reagents/materials/analysis tools: MA. Wrote the paper: MF MA MZ PB FKN CEK.