University of London, University of London, University of London, St George's University Hospitals NHS Foundation Trust, Schizophrenia Research Foundation (SCARF), University of London, University Mohammed VI of Health Sciences, London School of Hygiene & Tropical Medicine, Japan Institute for Health Security, Japan Institute for Health Security, Centre for Health and Migration, University of Medicine and Pharmacy at Ho Chi Minh City, Maastricht University, London School of Hygiene and Tropical Medicine and University of London