Amniocentesis in mothers who are hepatitis B virus carriers does not expose the infant to an increased risk of hepatitis B virus infection - Ko, T. -M.; Tseng, L. -H.; Chang, M. -H.; Chen, D. -S.; Hsieh, F. -J.; Chuang, S. -M.; Lee, T. -Y. (Springer, 1994)
http://dx.doi.org/10.1007/BF02390671
Keywords: WW-YZ