1 Alcohol Biology Unit, Department of Psychiatry and Neurochemistry, Institute of Neuroscience and Physiology, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden.
2 Beroendekliniken, Sahlgrenska University Hospital, Gothenburg, Sweden.
3 Department of Global Public Health, Karolinska Institutet, Stockholm, Sweden.
4 Unit of Clinical Alcohol Research, Institute of Clinical Research, University of Southern Denmark, Odense, Denmark.