1. University Hospital; 1st Department of Anaesthesiology and Intensive Care; Kopernika 36 Krakow Poland 31-501
2. Jagiellonian University College of Medicine; Department of Clinical Pharmacology and Department of Pain Treatment and Palliative Care; Krakow Poland
3. Jagiellonian University, Collegium Medicum; Department of Pain Research and Therapy; ul. Sniadeckich 10 Krakow Poland
4. Jagiellonian University, Collegium Medicum; Department of Pain Treatment and Palliative Care; Ul. Św. Anny 12 Krakow Poland