I got what I needed (<http://www.ncbi.nlm.nih.govjavascript:AL_get(this, 
'jour', 'Proc Natl Acad Sci U S A.');>Proc Natl Acad Sci U S A. 2006 Aug 
22;103(34):12903-10. Epub 2006 Aug 10). Many thanks to you all for your 
kind help.

Marie Elias, MLS
Medical Librarian
The Medical Letter, Library
1000 Main Street
New Rochelle, NY 10801
Tel:  914-235-0500 Ext. 307 or 334
Fax:  914-235-5079