Queirós, L., Condeço, J., Tender, A., Mateus, M., Teixeira, A. and Pascoal, H. 1997. The seroprevalence for hepatitis E viral antibodies in the northern region of Portugal (among the donor population). Acta Médica Portuguesa. 10, 6-7 (Jul. 1997), 447–53. DOI:https://doi.org/10.20344/amp.2450.