1 Psychopharmacology, Drug Misuse and Novel Psychoactive Substances Research Unit, School of Life and Medical Sciences, University of Hertfordshire, College Lane Campus, Hatfield, UK. f.schifano@herts.ac.uk.
2 Psychopharmacology, Drug Misuse and Novel Psychoactive Substances Research Unit, School of Life and Medical Sciences, University of Hertfordshire, College Lane Campus, Hatfield, UK.
3 East London Foundation Trust (ELFT), Newham Early Intervention Service, London, UK.
4 Department of Mental Health, ASL Roma 2, Rome, Italy.
5 Addictions' Observatory (ODDPSS), Rome, Italy.
6 Department of Psychology, Guglielmo Marconi University, Rome, Italy.
7 Swansea University Medical School, Institute of Life Sciences 2, Swansea University, Singleton Park, Swansea, UK.