Funding for this research was provided by:
Göteborgs Läkaresällskap (779301)
Västra Götalandsregionen (ALFGBG-143331)
Magnus Bergvalls Stiftelse
Frimurare Barnhusdirektionen (792731)
Received: 16 December 2020
Accepted: 7 March 2021
First Online: 15 March 2021
: Parents provided written informed consent for their children and the study was approved by the Ethics Board of Gothenburg (Dnr 363–05 and 674 − 14).
: Not applicable.
: MS, MH, JS, ACL and AR have no conflicts of interest to declare. AEW, IA and BH are shareholders of Flora Innovation, a researcher-driven company that aims to develop preventive therapies against immunoregulatory diseases such as allergy.