[a
]Centre for Public Health Data Science, Institute of Health Informatics, University
College London, London WC1N 1EH, UK
[b
]Institute for Global Health, University College London, London WC1N 1EH, UK
[c
]Norwegian Institute of Public Health, Oslo, Norway
[d
]Johns Hopkins Bloomberg School of Public Health and Johns Hopkins Center for Humanitarian
Health, Baltimore, MD, USA