Barbati, Antonella
Aisa, Maria Cristina
Cappuccini, Benito
Zamarra, Mariarosalba
Gerli, Sandro
Di Renzo, Gian Carlo
Article History
Received: 19 November 2019
Revised: 14 April 2020
Accepted: 29 April 2020
First Online: 18 May 2020
Competing interests
: The authors declare no competing interests.
: Infants were recruited with parents’ consent and a written informed consent was obtained. Participation in the study was voluntary and the parents were informed verbally and by a written information sheet about the aim of the study.