1 Department of Anaesthesiology and Intensive Care, Wroclaw Medical University, Poland; Department of Paediatric Anaesthesiology and Intensive, University Hospital, Wroclaw, Poland. Electronic address: marzena.zielinska@umw.edu.pl.
2 Department of Anaesthesiology and Intensive Care, Regional Specialist Hospital in Grudziac, Poland.
3 Department of Anaesthesiology and Intensive Care, Wolski Hospital, Warsaw, Poland.