Thorens, Gabriel; Division of Addictology, Geneva University Hospitals, Rue verte, 2, Geneva 1205, Switzerland
Khazaal, Yasser; Division of Addictology, Geneva University Hospitals, Rue verte, 2, Geneva 1205, Switzerland
Billieux, Joël; Cognitive Psychopathology and Neuropsychology Unit, University of Geneva, Geneva, Switzerland
Zullino, Daniele; Division of Addictology, Geneva University Hospitals, Rue verte, 2, Geneva 1205, Switzerland