Funding for this research was provided by:
Società Italiana di Neonatologia
Received: 20 April 2021
Accepted: 4 October 2021
First Online: 2 December 2021
: To the best of our knowledge, ethics approval for this type of study, which does not mention or involve parents, families or infants, is not needed. All the directors of the operating units involved with the collection and elaboration of the data presented in this manuscript agreed to participate in this research.
: All the authors have consented to the publication of this manuscript.
: No competing interests have emerged.