I recall a study that looked at this very situation. I'll try to find the reference. It was one we used to help promote pumps from a certain company (that I once worked for) mary kay smith *********************************************** 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