Macedo, G., Pinto, T., Sarmento, J.A., Vale, A.M. and Ribeiro, T. 1998. The first assessment of hepatitis E virus seroprevalence in northern Portugal. Acta Médica Portuguesa. 11, 12 (Dec. 1998), 1065–8. DOI:https://doi.org/10.20344/amp.2366.