Debbie, Sorry I have not responded to your note earlier. The NIH is National Institute of Health in Washington DC. They sent me an email yesterday saying my subscription did not go through, so will try again next week. Look for NIH LISTSERV List Owner's Guide. Good luck Rilla ---------------------------------------------------------------------- To sign-off Parkinsn send a message to: mailto:[log in to unmask] In the body of the message put: signoff parkinsn