Down-Klinefelter syndrome (48,XXY,+21) in a neonate associated with congenital heart disease. M. A. Rodrigues, Morgade, L. F., Dias, L. F. A., Moreira, R. V., Maia, P. D., Sales, A. F. H., and Ribeiro, P. D., “Down-Klinefelter syndrome (48,XXY,+21) in a neonate associated with congenital heart disease.”, Genet Mol Res, vol. 16, no. 3, 2017. Read more about Down-Klinefelter syndrome (48,XXY,+21) in a neonate associated with congenital heart disease.Google ScholarPubMedDOI