1. Department of Obstetrics, Perinatology and Neonatology, Center of Postgraduate Medical Education, 01-813 Warsaw, Poland
2. Research Unit, Polish Society of Disaster Medicine, 05-816 Warsaw, Poland
3. Department of Gynecology, University Hospital Zürich, 8005 Zürich, Switzerland
4. Henry JN Taub Department of Emergency Medicine, Baylor College of Medicine, Houston, TX 77030, USA
5. Institute of Outcomes Research, Maria Sklodowska-Curie Medical Academy, 00-136 Warsaw, Poland