I have done quite a bit of work in this area and have not heard of anyone giving such advice. Obviously, such advice is totally unfounded. The cabin air quality is probably more toxic than the cosmic ray exposure. Kenneth L. Mossman Arizona State University Tempe, AZ 85287-2701 Phone: (602) 965-0584 FAX: (602) 991-4998 E-mail: ken.mossman@asu.edu