Deanne, One site to read is: http://jnci.oupjournals.org/cgi/content/abstract/91/20/1765 another is: http://www.medscape.com/reuters/prof/1999/10/10.21/ep10219i.html -- Denny Rice, RN, IBCLC Dallas Texas USA *********************************************** The LACTNET mailing list is powered by L-Soft's renowned LISTSERV(R) list management software together with L-Soft's LSMTP(TM) mailer for lightning fast mail delivery. For more information, go to: http://www.lsoft.com/LISTSERV-powered.html