Or. James E. Sarn Assistant. Director Division of Disease Control Services 411 North 24th Street Phoenix, AZ 85008 Mr. Joseph 0. Ward Chief Radiologic Health Section California Department of Health Sciences 714 "P" Street Sacramento, CA 95814 Dr. McDonald E. Wrenn Department of Pharmacology Radiobiology Division University of Utah, Building 522 Salt Lake City, UT 84112 Mr. Michael D. Zimmerman Attorneys at Law WATKISS AND CAMPBELL 310 S. Main Street, Suite 1200 Salt Lake City, UT 84101