Santos, A., Carvalho, A., Tomaz, J., Rodrigues, V., Coxinho, L., Bento, D., Sá, R. and Porto, A. 2000. Prevalence of markers of hepatitis B infection in the adult population of the district of Coimbra. Acta Médica Portuguesa. 13, 4 (Aug. 2000), 167–71. DOI:https://doi.org/10.20344/amp.1790.