1. Department of Obstetrics and Gynecology, Clinica Universidad de Navarra, University of Navarra, 31008 Pamplona, Spain
2. Centro Integrato di Procreazione Medicalmente Assistita (PMA) e Diagnostica Ostetrico-Ginecologica, Azienda Ospedaliero Universitaria-Policlinico Duilio Casula Monserrato, University of Cagliari, 09124 Cagliari, Italy
3. Department of Medical and Surgical Sciences, Universita degli Studi di Trieste, 34127 Trieste, Italy
4. Faculty of Medicine, Los Andes University, Santiago 12455, Chile
5. Department of Obstetrics, Gynecology and Reproduction, Institut Universitari Dexeus, 08028 Barcelona, Spain