Passos, Afonso D. C., et al. “ Influence of Migration on Prevalence of Serological Hepatitis B Markers in a Rural Community: 1- Analysis of Prevalence by Birthplace ”. Revista De Saúde Pública, vol. 27, no. 1, Feb. 1993, pp. 30-35, https://doi.org/10.1590/S0034-89101993000100005.