University of Nottingham - Population and Lifespan Sciences Unit, Addis Ababa University - WHO Collaborating Centre for Mental, London School of Hygiene & Tropical Medicine - MRC International Statistics and Epidemiology Group, Addis Ababa University - Akililu Lemma Institute of Pathobiology, Addis Ababa University - WHO Collaborating Centre for Mental, Public Health Foundation of India - Centre for Chronic Conditions and Injuries, Wellcome Trust, Addis Ababa University - Department of Psychiatry and Addis Ababa University - WHO Collaborating Centre for Mental