[1] Heidelberg Univ, Cent Inst Mental Hlth, Dept Addict Behav & Addict Med, Med Fac Mannheim, Mannheim, Germany
[2] Natl Hosp Org, Kurihama Med & Addict Ctr, Yokosuka, Kanagawa, Japan
[3] Yale Univ, Sch Med, Dept Psychiat, New Haven, CT USA
[4] Yale Univ, Sch Med, Dept Neurobiol, New Haven, CT USA
[5] Yale Univ, Sch Med, Ctr Child Study, New Haven, CT 06510 USA
[6] Yale Univ, Sch Med, CASAColumbia, New Haven, CT USA
[7] Univ Queensland, Ctr Youth Subst Abuse Res, Brisbane, Qld, Australia
[8] Univ Sydney, Fac Med, Discipline Psychiat, Sidney, BC, Canada
[9] Univ Sydney, Fac Med, Discipline Addict Med, Sidney, BC, Canada