Mereu, Liliana
Carlin, Roberta
Pellegrini, Alice
Guasina, Francesca
Berlanda, Valeria
Tateo, Saverio
Article History
Received: 21 April 2018
Accepted: 24 October 2018
First Online: 14 November 2018
Ethics approval and consent to participate
: Ethical approval is not required for a restrospective study.
: Yes.
: The authors declare that they have no competing interests.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.