[1
] Christian Aid, London, UK;
[2
] Faculty of Public Health and Policy, London School of Hygiene and Tropical Medicine,
London, UK;
[3
] Christian Aid, Nairobi, Kenya;
[4
] Christian Aid, Lagos, Nigeria;
[5
] Institute of Geography and Development Studies, Njala University, Bo, Sierra Leone;
[6
] Christian Aid, Freetown, Sierra Leone