1. aUniversidad de Alcalá de Henares, Madrid, Spain;
2. bTrial Form Support Develop, Madrid, Spain;
3. cAddictive Behaviour Unit of Psychiatry, Vall d’Hebron University Hospital, Barcelona, Spain;
4. dDepartment of Medicine, Psychiatry Area, University of Oviedo, Oviedo, Spain;
5. eCentro de Investigación Biomédica en Red de Salud Mental, CIBERSAM, Oviedo, Spain;
6. fDepartment of Medicine, Psychiatry Area, University of Oviedo, Oviedo, Spain