Retraction to: Journal of Perinatology (2008) 28:685–690 https://doi.org/10.1038/jp.2008.73, published online 26 June 2008

The Editor-in-Chief has retracted this article in line with the guidelines of the Committee on Publication Ethics (COPE) because the study it reports has been published previously [1]. H. Abdel-Hady does not agree with this retraction. M. El-Daker and R. El-Kady have not responded to any correspondence from the publisher about this retraction, S. Hawas is deceased.