1 Psychopharmacology, Drug Misuse, and Novel Psychoactive Substances Research Unit, School of Life and Medical Sciences, University of Hertfordshire, Hatfield, UK.
2 Homerton University Hospital, London, UK.
3 Swansea University Medical School, Institute of Life Sciences 2, Swansea University, Singleton Park, Swansea, Wales.
4 Camden and Islington NHS Mental Health Foundation Trust, London, UK.
5 Department of Mental Health, ASL Roma 1, Rome, Italy.
6 LVR-Klinikum Essen, Klinik für Psychiatrie und Psychotherapie, University of Duisburg-Essen, Essen, Germany.
7 Addictions' Observatory (ODDPSS), Rome, Italy.
8 'Guglielmo Marconi' University, Rome, Italy.
9 Department of Mental Health, ASL Roma 2, Rome, Italy.