1. Population, Policy, and Practice Programme; Institute of Child Health; University College London; London UK
2. Departamento de Biologia Animal; Faculdade de Ciências; University of Lisbon; Lisbon Portugal
3. Research Centre for Anthropology and Health; Department of Life Sciences; University of Coimbra; Coimbra Portugal
4. University of Tras-os-Montes and Alto Douro; Vila Real Portugal
5. Department of Geography; University of Coimbra; Coimbra Portugal
6. Tropical Research Institute of Lisbon; Lisbon Portugal