1. Kenya Medical Research Institute Centre for Geographic Medicine Research Coast Kilifi Kenya
2. Department of Psychiatry University of Oxford Oxford United Kingdom
3. Wellcome Trust Centre for Human Genetics University of Oxford Oxford United Kingdom
4. Faculty of Infectious and Tropical Diseases London School of Hygiene and Tropical Medicine London United Kingdom
5. Department of Physiology School of Medical Sciences Kwame Nkurumah University of Science and Technology Kumasi Ghana
6. Department of Internal Medicine College of Osteopathic Medicine Michigan State University East Lansing Michigan U.S.A
7. International Neurologic and Psychiatric Epidemiology Program Michigan State University East Lansing Michigan U.S.A
8. Nuffield Department of Clinical Medicine University of Oxford Oxford United Kingdom
9. Neurosciences Unit Institute of Child Health University College London London United Kingdom