Borghi, L. http://orcid.org/0000-0001-9581-9921
Leone, D.
Poli, S.
Becattini, C.
Chelo, E.
Costa, M.
De Lauretis, L.
Ferraretti, A. P.
Filippini, C.
Giuffrida, G.
Livi, C.
Luehwink, A.
Palermo, R.
Revelli, A.
Tomasi, G.
Tomei, F.
Vegni, E.
Article History
Received: 12 November 2018
Accepted: 28 April 2019
First Online: 10 May 2019
Compliance with ethical standards
: The research project was approved by the Ethical Review Board of the University of Milan and by the Ethical Review Boards of the eight participating ART clinics. Written informed consent was obtained from each participant included in the study, and patients and physicians were guaranteed the right to withdraw voluntarily if they so decide.