Thanks Kathy this info was good to know. Deborah Refer to this Scientific American, Ask the Experts article: http://www.sciam.com/askexpert/medicine/medicine11.html _________________________________________________________________ Join the world’s largest e-mail service with MSN Hotmail. http://www.hotmail.com ---------------------------------------------------------------------- To sign-off Parkinsn send a message to: mailto:[log in to unmask] In the body of the message put: signoff parkinsn