1. Collegium Medicum, Jan Kochanowski University in Kielce, 25-369 Kielce, Poland
2. Clinic of Neonatology, Provincial Combined Hospital Kielce, 25-736 Kielce, Poland
3. Esculap Student’s Scientific Society, Jan Kochanowski University in Kielce, 25-369 Kielce, Poland
4. Department of Obstetrics and Gynaecology, Provincial Combined Hospital in Kielce, 25-736 Kielce, Poland