1 | Department of Anesthesiology and Intensive Care, WSS Hospital, Olsztyn, Poland |
2 | Department of Anaesthesiology and Intensive Care, Faculty of Medicine, Collegium Medicum, University of Warmia and Mazury in Olsztyn, Poland |
3 | Hospital zum heiligen Geist in Fritzlar, Germany |
4 | Pro-Medica Hospital, Ełk, Poland |
5 | Independent Non- Public Health Care Institution Pro Vita, Ełk, Poland |
6 | Klinikum Lippe, Detmold, Germany |