1. Department of Interdisciplinary Intensive Care, Jagiellonian University Medical College, Kraków, Poland
2. Department of Palliative Medicine, Poznan University of Medical Sciences, Poznan, Poland
3. Department of Pain Pharmacology, Institute of Pharmacology, Polish Academy of Sciences, Kraków, Poland
4. Department of Pain Research and Treatment, Jagiellonian University Medical College, Kraków, Poland