Funding for this research was provided by:
Signe ja Ane Gyllenbergin Säätiö
Terveyden Tutkimuksen Toimikunta (134950, 253270)
Jane ja Aatos Erkon Säätiö
Received: 30 September 2019
Accepted: 9 July 2020
First Online: 20 July 2020
Ethics approval and consent to participate
: The study protocols were approved by The Joint Ethics Committee of University of Turku and Turku University Hospital (Breastfeeding study: 17.2.2013 §88 ETMK 121/1801/2013). All participants provided written informed consent.
: Not applicable as the manuscript does not contain data from any individual person.
: The authors declare that they have no competing interests.