1. Department of Infectious Disease Epidemiology, London School of Hygiene and Tropical Medicine, London, UK
2. School of Tropical Medicine and Global Health, Nagasaki University, Nagasaki, Japan
3. Department of Pediatric Infectious Diseases, Institute of Tropical Medicine, Nagasaki University, Nagasaki, Japan
4. Department of Public Health Intelligence, Public Health Authority, Riyadh, Saudi Arabia
5. Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, Japan