[1]
L. Queirós, J. Condeço, A. Tender, M. Mateus, A. Teixeira, and H. Pascoal, “The seroprevalence for hepatitis E viral antibodies in the northern region of Portugal (among the donor population)”., Acta Med Port, vol. 10, no. 6-7, pp. 447–53, Jul. 1997.