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Anna Myriam Perrone, Federica Pozzati, Donatella Santini, Martina Rossi, Martina Procaccini, Lucia Casalini, Erica Santi, Marco Tesei, Claudio Zamagni, Pierandrea De Iaco 
World J Obstet Gynecol 3(4):162-170. Published online Nov 10, 2014. doi: 10.5317/wjog.v3.i4.162