1 Department of Obstetrics and Gynecology, EOC-Beata Vergine Hospital, Mendrisio, Switzerland; Faculty of Biomedical Sciences, Università della Svizzera Italiana, Lugano, Switzerland. Electronic address: andrea.braga@eoc.ch.
2 Department of Obstetrics and Gynecology, Del Ponte Hospital, University of Insubria, Varese, Italy.