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/s004040050021
Keywords: WW-YZ