Links to articles appearing on other sites or sources are subject to the reproduction rules of those sites or sources. All other articles appearing in this newsletter are copyrighted by Board of Trustees of the University of Illinois (2003) unless otherwise noted. These articles may be freely distributed electronically provided that they are distributed in their entirety and include the following notice: "This article originally appeared in The NCPAD-News, issue date ##. It may be freely distributed electronically as long as it includes this notice but cannot be edited, modified, or distributed in other form(s) without the express written permission of NCPAD. Write to email@example.com for additional details." Any other use of the materials in NCPAD-News or on the NCHPAD Web site at http://www.ncpad.org/Homepage, including modification or re-publication without our prior written permission is strictly prohibited. This includes, but is not limited to, posting to another Web site. Contact us via e-mail at firstname.lastname@example.org. The information provided in this material was supported by Grant/Cooperative Agreement Number U59/CCU516732 from the Centers for Disease Control and Prevention (CDC). The contents are solely the responsibility of the authors and do not necessarily represent the official views of CDC.