[1] UCL, Div Psychiat, 6th Floor,Maple House,149 Tottenham Court Rd, London W1T 7NF, England
[2] Univ Milano Bicocca, Dept Med & Surg, Monza, Italy
[3] Univ St Andrews, Sch Med, Med & Biol Sci Bldg North Haugh, St Andrews, Fife, Scotland
[4] Startheden Hosp, Playfield Inst, Cupar, Scotland
[5] Univ Duisburg Essen, Fac Med, Dept Addict Behaviour & Addict Med, LVR Hosp Essen, Essen, Germany