About the Authors

Liane Correia-Costa

liane@med.up.pt

Affiliations EPIUnit—Institute of Public Health, University of Porto, Porto, Portugal, Division of Pediatric Nephrology, Integrated Pediatric Hospital, Centro Hospitalar São João, Porto, Portugal

Ana Cristina Santos

Affiliations EPIUnit—Institute of Public Health, University of Porto, Porto, Portugal, Department of Clinical Epidemiology, Predictive Medicine and Public Health, University of Porto Medical School, Porto, Portugal

Milton Severo

Affiliations EPIUnit—Institute of Public Health, University of Porto, Porto, Portugal, Department of Clinical Epidemiology, Predictive Medicine and Public Health, University of Porto Medical School, Porto, Portugal

António Guerra

Affiliation Division of Pediatric Nutrition, Integrated Pediatric Hospital, Centro Hospitalar São João, Porto, Portugal

Franz Schaefer

Affiliation Division of Pediatric Nephrology, Center for Pediatrics and Adolescent Medicine, University of Heidelberg, Heidelberg, Germany

Alberto Caldas Afonso

Affiliations EPIUnit—Institute of Public Health, University of Porto, Porto, Portugal, Division of Pediatric Nephrology, Integrated Pediatric Hospital, Centro Hospitalar São João, Porto, Portugal

Henrique Barros

Affiliations EPIUnit—Institute of Public Health, University of Porto, Porto, Portugal, Department of Clinical Epidemiology, Predictive Medicine and Public Health, University of Porto Medical School, Porto, Portugal

Ana Azevedo

Affiliations EPIUnit—Institute of Public Health, University of Porto, Porto, Portugal, Department of Clinical Epidemiology, Predictive Medicine and Public Health, University of Porto Medical School, Porto, Portugal

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: LCC AG ACA HB AA. Performed the experiments: LCC ACS HB AA. Analyzed the data: LCC ACS MS AG FS ACA HB AA. Contributed reagents/materials/analysis tools: ACS MS HB AA. Wrote the paper: LCC ACS MS AG FS ACA HB AA.