1. Social Anthropology; School of Social Sciences, University of Manchester, Manchester; M13 9PL United Kingdom
2. Fundação Oswaldo Cruz; Escola Nacional de Saúde Pública; Rua Leopoldo Bulhões 1480; sala 617, Rio de Janeiro 21041-210 Brazil
3. Social Anthropology, School of Social Sciences; University of Manchester, Manchester; M13 9PL United Kingdom