- Address correspondence and reprint requests to: Charles A. Ballard, Department of Obstetrics and Gynecology, University of Southern California Keck School of Medicine, 1240 N. Mission Road, Rm. L1014, Los Angeles, CA 90033. Email:
- First published January 1, 2005.
If you wish to reuse any or all of this article please use the link below which will take you to the Copyright Clearance Center’s RightsLink service. You will be able to get a quick price and instant permission to reuse the content in many different ways.