Hepatitis A and E seroprevalence and associated risk factors: a community-based cross-sectional survey in rural Amazonia - Vitral; Silva-Nunes, Mônica da; Pinto, Marcelo Alves; Oliveira, Jaqueline Mendes de; Gaspar, Ana Maria Coimbra; Pereira, Rebeca Cristina Costa; Ferreira, Marcelo Urbano (BMC Infectious Diseases, 2014)