[1
]
Istituto Ostetrico e Ginecologico 'Luigi Mangiagalli', Department of Clinical Science
and Community Health, Università degli Studi, Milano, Italy paolo.vercellini@unimi.it.
[2
]
Istituto Ostetrico e Ginecologico 'Luigi Mangiagalli', Department of Clinical Science
and Community Health, Università degli Studi, Milano, Italy.
[3
]
Infertility Unit, Fondazione IRCCS Ca' Granda, Ospedale Maggiore Policlinico, Milano,
Italy.
[4
]
Obstetrics and Gynecology Unit, San Raffaele Scientific Institute, Milano, Italy.