Rita Weeks made an eloquent defense of PD registration Bravo! That's what makes horse races! I still would feel better if it was done by a clinical study, or by an institute of repute, like the Mayo Clinic, rather than by people hired by politicians or burocrats, even well-meaning ones. If the lifting of driver's licences is a true possibility, then that illustrates the point. Will A. Kuipers ( 75 / dx '91 ) INTERNET:[log in to unmask]