Received: 24 April 2020
Accepted: 19 May 2020
First Online: 24 May 2020
Ethics approval and consent to participate
: Written informed consent was obtained from both parents at birth or admission of their newborns. The study was approved by the Mother and Child Department of the University of Palermo (Palermo, Italy). All procedures performed in this study were in accordance with the ethical standards of the institutional and national research committee, and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
: Not applicable.
: The authors declare that they have no competing interests.