About the Authors

Agneta Kiss

Contributed equally to this work with: Agneta Kiss, Marianna Lucio

Affiliation EquipeTRACES, Institut des Sciences Analytiques-UMR, Villeurbanne, France

Marianna Lucio

Contributed equally to this work with: Agneta Kiss, Marianna Lucio

Affiliation Helmholtz Zentrum München, German Research Center for Environmental Health, Neuherberg, Germany

Aurélie Fildier

Affiliation EquipeTRACES, Institut des Sciences Analytiques-UMR, Villeurbanne, France

Corinne Buisson

Affiliation Département des analyses, Agence Française de Lutte contre le Dopage (AFLD), Châtenay-Malabry, France

Philippe Schmitt-Kopplin

Affiliations Helmholtz Zentrum München, German Research Center for Environmental Health, Neuherberg, Germany, Chair of Analytical Food Chemistry, Technische Universität München, Freising-Weihenstephan, Germany

Cécile Cren-Olivé

c.cren@sca.cnrs.fr

Affiliation EquipeTRACES, Institut des Sciences Analytiques-UMR, Villeurbanne, France

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: AK CC PS. Performed the experiments: AK AF. Analyzed the data: AK ML. Contributed reagents/materials/analysis tools: CB. Wrote the manuscript: AK.