1. Scientific Foresight Unit (Science and Technology Options Assessment [STOA]), Directorate-General for Parliamentary Research Services (EPRS), European Parliament, Brussels, Belgium;
2. Department of Medicine, Addiction Medicine Unit, Verona University Hospital, Italy;
3. Department of International Health/CAPHRI, Maastricht University, The Netherlands;
4. European Monitoring Centre for Drugs and Drug Addiction (EMCDDA), Lisbon, Portugal;
5. European Brain Council, Brussels, Belgium;
6. Antwerp University (UA) and Hospital (UZA), Antwerp, Belgium;
7. Istituto Superiore di Sanità, Rome, Italy;
8. Department of Addictive Behavior and Addiction Medicine, Central Institute for Mental Health, University of Heidelberg, Medical Faculty, Mannheim, Germany;
9. Department of Medicine and Surgery, University Milano Bicocca, Italy