many individuals in the U. S. Atomic Energy Commission, Brookhaven National Laboratory and the Trust Territory of the Pacific Islands for their support of the medical surveys of the Marshallese people exposed to fallout. We also wish to thank P. Crumrine and W. A. Scott for valuable assistance. This investigation was supported in part by U. S. Public Health Service Grant CA 06930 and U. S. Atomic Energy Commission Contract AT(30-1)-3777 with the New England Deaconess Hospital. 141 2008429