Received: 9 September 2019
Accepted: 30 March 2020
First Online: 13 April 2020
Ethics approval and consent to participate
: The study has been approved by National ethics committee of Slovenia (0120–458/2016–3 KME 67/09/16) and has been performed in accordance with the ethical standards as laid down in the 1964 Declaration of Helsinki and its later amendments or comparable ethical standards. Parents of all participating newborns gave their written informed consent.
: Not applicable.
: Authors have no financial relationships relevant to this article to disclose.