1. Department of Clinical Biochemistry, Royal Prince Alfred Hospital, Sydney, Australia
2. Genetic Epidemiology Unit, Queensland Institute of Medical Research, Brisbane, Australia
3. Department of Psychiatry and Human Genetics, Virginia Commonwealth University, Richmond, Virginia, USA
4. Section of Molecular Epidemiology, Leiden University Medical Center, Leiden, the Netherlands
5. Missouri Alcoholism Research Center, Department of Psychiatry, Washington University School of Medicine, St. Louis, Missouri, USA