Funding for this research was provided by:
Ministero dell’Istruzione, dell’Università e della Ricerca (RBSI14LHMB)
Received: 13 May 2018
Accepted: 25 March 2019
First Online: 6 June 2019
Ethics approval and consent to participate
: The Ethics Committee of the St. Orsola-Malpighi Hospital (Bologna, Italy) approved the study on September 13, 2016 (89/2016/U/Sper). Written informed consent was obtained from all participants.
: Not applicable.
: The authors declare that they have no competing interests.
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