1. Second Department of Obstetrics and Gynecology, Ippokration General Hospital; Aristotle University of Thessaloniki; Thessaloniki; Greece
2. Cyprus International Institute for Environmental and Public Health; Cyprus University of Technology; Limassol; Cyprus
3. Embryocare; Prenatal Diagnostic Center; Athens; Greece
4. Department of Obstetrics and Gynecology; University of Ioannina; Ioannina; Greece