About the Authors

Pirjo Wacklin

pirjo.wacklin@bts.redcross.fi

Affiliation Finnish Red Cross Blood Service, Helsinki, Finland

Harri Mäkivuokko

Affiliation Finnish Red Cross Blood Service, Helsinki, Finland

Noora Alakulppi

Affiliation Finnish Red Cross Blood Service, Helsinki, Finland

Janne Nikkilä

Affiliation Finnish Red Cross Blood Service, Helsinki, Finland

Heli Tenkanen

Affiliation Finnish Red Cross Blood Service, Helsinki, Finland

Jarkko Räbinä

Affiliation Finnish Red Cross Blood Service, Helsinki, Finland

Jukka Partanen

Affiliation Finnish Red Cross Blood Service, Helsinki, Finland

Kari Aranko

Affiliation Finnish Red Cross Blood Service, Helsinki, Finland

Jaana Mättö

Affiliation Finnish Red Cross Blood Service, Helsinki, Finland

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: PW JM KA. Performed the experiments: PW HT NA. Analyzed the data: PW JN NA. Contributed reagents/materials/analysis tools: HT HM JM JN. Wrote the paper: PW JM JP JR NA HM. Significantly contributed the sample collection: PW KA. Designed and conducted the collection of the faecal samples: JM HM.