1. Fetal Medicine Research Center, BCNatal, Barcelona Center for Maternal‐Fetal and Neonatal Medicine (Hospital Clínic and Hospital Sant Joan de Deu), Institut Clínic de Ginecologia, Obstetricia i Neonatologia, Universitat de Barcelona Barcelona Catalonia Spain
2. Department of Obstetrics and Gynaecology, Prince of Wales Hospital The Chinese University of Hong Kong, Shatin Hong Kong SAR China
3. Second Department of Obstetrics and Gynecology, Faculty of Medicine Aristotle University of Thessaloniki Thessaloniki Greece