Obukhova, Polina; Rieben, Robert; Bovin, Nicolai (2007). Normal human serum contains high levels of anti-Gal alpha 1-4GlcNAc antibodies. Xenotransplantation, 14(6), pp. 627-35. Hoboken, N.J.: Wiley 10.1111/j.1399-3089.2007.00436.x
