1. Clinic of Anesthesiology, Lithuanian University of Health Sciences, Kaunas, Lithuania
2. Clinic of Anesthesiology and Intensive Care, Faculty of Medicine, Vilnius University, Vilnius, Lithuania
3. Clinic of Anesthesiology and Intensive Care, Institute of Clinical Medicine, University of Tartu, Tartu, Estonia
4. Faculty of Medicine, University of Latvia, Riga, Latvia
5. Barking, Havering and Redbridge University Hospitals, London, United Kingdom