1. National Drug Research Institute; Curtin University; Perth Australia
2. Centre for Health Services Research; School of Population Health; The University of Western Australia; Perth Australia
3. Melbourne School of Population and Global Health; University of Melbourne, Parkville; Parkville Australia
4. National Drug and Alcohol Research Centre; University of New South Wales; Sydney Australia
5. Trimbos-Instituut; ICASA Foundation; Utrecht The Netherlands
6. Amsterdam Institute for Addiction Research; Department of Psychiatry; Academic Medical Center; University of Amsterdam; Amsterdam The Netherlands