1. First Faculty of Medicine, Department of Addictology, Charles University, Prague, Czechia
2. Department of Addictology, General University Hospital in Prague, Prague, Czechia
3. Department of Psychiatry, University Hospital Hradec Králové, Hradec Králové, Czechia
4. Faculty of Medicine, Department of Psychiatry, University Hospital in Pilsen, Pilsen, Czechia
5. Institute of Postgraduate Medical Education, Prague, Czechia