[1] Prince Songkla Univ, Fac Med, Dept Psychiat, Hat Yai 90110, Songkhla, Thailand
[2] Univ Sydney, Royal Prince Alfred Hosp, Drug & Alcohol Dept, Sydney, NSW 2006, Australia
[3] Univ Sydney, Dept Med, Sydney, NSW 2006, Australia
[4] Univ Sydney, Dept Psychol Med, Sydney, NSW 2006, Australia
[5] Univ Sydney, Dept Publ Hlth, Sydney, NSW 2006, Australia
[6] Univ Sydney, Dept Community Med, Sydney, NSW 2006, Australia
[7] Univ Queensland, Royal Brisbane Hosp, Dept Psychiat, Ctr Drug & Alcohol Studies, Herston, Qld, Australia