1. Molecular Psychiatry Laboratory, Division of Psychiatry, University College London, London, UK
2. Department of Psychiatry, Yale School of Medicine, New Haven
3. Department of Psychiatry, Veterans Affairs Connecticut Healthcare System, West Haven, Connecticut, USA
4. Institute of Health Informatics, University College London, London, UK
5. Royal Alexandria Hospital, NHS Greater Glasgow and Clyde, Paisley, UK
6. Department of Gastroenterology, Dumfries & Galloway Royal Infirmary, Cargenbridge, Dumfries, Scotland
7. Substance misuse service, Mayfield Centre, St Ninians, Stirling, UK
8. Department of Child and Adolescent Psychiatry, University of Duisburg-Essen, Essen
9. Institute of Human Genetics, University of Bonn, School of Medicine & University Hospital Bonn, Bonn, Germany
10. UCL Institute for Liver & Digestive Health, Division of Medicine, Royal Free Campus, University College London, London, UK
11. Department of Psychiatry, University of Pennsylvania Perelman School of Medicine
12. Crescenz Veterans Affairs Medical Center, Philadelphia, Pennsylvania
13. Departments of Genetics and Neuroscience, Yale University School of Medicine, New Haven, Connecticut, USA