Received: 26 March 2020
Accepted: 29 July 2020
First Online: 14 September 2020
Ethics approval and consent to participate
: The protocol, information letter to the parents/caregivers and informed consent form were approved by Harokopio University’s Ethics Committee. Written informed consent was obtained from parents after an explanation of the study procedures and prior to inclusion by the study paediatrician.
: Not applicable.
: ITV, MMV, PP and RB are employees at FrieslandCampina. Any opinions, findings, conclusions or recommendations expressed in the current study are those of the authors and do not necessarily reflect the views of FrieslandCampina. The other authors report no conflicts of interest.