[1] Univ Messina, Dept Human Pathol Adulthood & Childhood G Barresi, Unit Gynecol & Obstet, Via Consolare Valeria 1, I-98125 Messina, Italy
[2] Ist Sicurezza Sociale, Dept Obstet & Gynecol, Cailungo Borgo Maggiore 47893, San Marino
[3] Inst Maternal & Child Hlth IRCCS Burlo Garofolo, Dept Obstet & Gynecol, Via Istria 65-1, I-34137 Trieste, Italy
[4] Yale Univ, Sch Med, Dept Obstet Gynecol & Reprod Sci, 333 Cedar St, New Haven, CT 06520 USA
[5] Magna Graecia Univ Catanzaro, Dept Expt & Clin Med, I-88100 Catanzaro, Italy
[6] Umberto I Hosp, Dept Obstet & Gynaecol, Enna, Italy
[7] Univ Catania, Dept Gen Surg & Med Surg Specialties, Via Tindaro 2, I-95124 Catania, Italy
[8] Univ Padua, Dept Woman & Child Hlth, Via Giustiniani 3, I-35128 Padua, Italy
[9] Univ Catania, Unit Psychodiagnost & Clin Psychol, Via Santa Sofia 78, I-95124 Catania, Italy
[10] Univ Catania, Dept Gen Surg & Med Surg Specialties, Via Santa Sofia 78, I-95124 Catania, Italy
[11] Univ Trieste, Osped Cattinara, Dept Med Surg & Hlth Sci, Str Fiume 447, I-34149 Trieste, Italy
[12] Desenzano del Garda Hosp, Sect Gavardo, Unit Gynecol & Obstet, Via A Gosa 74, I-25085 Brescia, Italy