About the Authors

Stefan Roos

Affiliation Department of Microbiology, Swedish University of Agricultural Sciences, Uppsala, Sweden

Johan Dicksved

Affiliation Department of Animal Nutrition and Management, Swedish University of Agricultural Sciences, Uppsala, Sweden

Valentina Tarasco

Affiliation Department of Pediatrics, Regina Margherita Children Hospital, University of Turin, Torino, Italy

Emanuela Locatelli

Affiliation Department of Pediatrics, Regina Margherita Children Hospital, University of Turin, Torino, Italy

Fulvio Ricceri

Affiliation Human Genetics Foundation–Molecular and Genetic Epidemiology Unit, Torino, Italy

Ulf Grandin

Affiliation Department of Aquatic Sciences and Assessment, Swedish University of Agricultural Sciences, Uppsala, Sweden

Francesco Savino

francesco.savino@unito.it

Affiliation Department of Pediatrics, Regina Margherita Children Hospital, University of Turin, Torino, Italy

Competing Interests

The University of Turin and Swedish University of Agricultural Sciences both received a donation from the manufacturer of L. reuteri DSM 17938, BioGaia AB, Lund, Sweden. There are no further patents, products in development or marketed products to declare. This does not alter the authors' adherence to all the PLOS ONE policies on sharing data and materials.

Author Contributions

Conceived and designed the experiments: FS SR. Performed the experiments: SR JD. Analyzed the data: VT EL FR. Contributed reagents/materials/analysis tools: SR JD UG. Wrote the paper: FS SR VT EL FR.