Funding for this research was provided by:
Samfundet Folkhälsan (NA)
Medicinska Understödsföreningen Liv och Hälsa (NA)
Svenska Kulturfonden (136865)
Received: 15 July 2019
Accepted: 13 July 2020
First Online: 21 August 2020
Ethics approval and consent to participate
: This study was carried out with the permission of the regional Ethics Committee of the Hospital District of Helsinki and Uusimaa (169/13/03/00/10) with written informed consent from all subjects and one of their legal guardians.
: All authors have given consent to publish this manuscript in <i>Microbiome</i>.
: The authors declare that they have no competing interests.