1. King's College London; Health Services & Population Research Department; Institute of Psychiatry; London UK
2. Centre for Adolescent Health; Royal Children's Hospital Murdoch Children's Research Institute; Parkville Vic. Australia
3. Clinical Epidemiology & Biostatistics Unit and Centre for Adolescent Health; Royal Children's Hospital; Murdoch Children's Research Institute; University of Melbourne; Parkville Vic. Australia
4. Department of Paediatrics; University of Melbourne; Parkville Vic. Australia
5. National Drug and Alcohol Research Centre; University of New South Wales; Sydney NSW Australia
6. School of Population and Global Health; University of Melbourne; Parkville Vic. Australia