37 aminations show somefindings persisting im the exposed people which need to be carefully fol- lowed. These include incomplete recovery of certain blood elements to levels found in the unexposed people, retardation of growth and development in some of the irradiated children, and pigmented changes at the sites of radiation burns of the skin. Recognizing the importance of these surveys, the Trust Territory of the Pacific Islands and the U.S. Atomic Energy Commission have agreed that annual medical surveys of the Marshallese people exposed to fallout in 1954 should continue indefihitely. Acknowledgments The cooperation of many agencies and persons was necessary to carry out these surveys successfully. The authors are deeply grateful to manyindividuals, too numerous to name, for valuable assistance. Manyofficials of the Atomic Energy Commission, particularly Dr. Charles L. Dunham, Dr. H. D. Bruner, and many of their staff of the Division of Biology and Medicine, were most helpful in the coordination of arrangements with various governmental agencies and in supporting these surveys in every possible way. Weare grateful to the officials of the Departmentof the Interior and particularly to the officials of the Trust Territory of the Pacific Islands inciuding the High Commissioner, Mr. M. W. Goding; the Director of Public Health, Dr. H. E. Macdonald; the District Administrator for the Marshall Islands, Mr. Peter Coleman; the Director of the Marshall Islands Memorial Hospital, Dr. John Taman, and others of his staff; and the Representative of the High Commissioner at Kwajalein, Mr. William White. Mr. Don Davis and his crew of the Trust Territory ship Ran Anim were most helpful. As in the past, the Department of Defense, particularly the Department of the Navy, contributed most vitally to the mission. The Pacific Missile Range Facility at Kwajalein was of great assistance in furnishing necessary airlifts and materials to be used on the survey. Captain Paul Holmberg, Commanding Officer, Mr. Ben Wilson of the Transport Companyof Texas, and Dr. Stewart Shippey at the Kwajalein Hospital were all extremely helpful. At Brookhaven National Laboratory, contributions were made by manyindividuals in many departments including Medical, Instrumentation and Health Physics, Photography and Graphic Arts,the Shipping Section, and others. We are grateful to the following people for their support and advice: Dr. Maurice Goldhaber, Director; Dr. Lee E. Farr. Chairman of the Medical Department, and others in this departmentincluding Drs. D. D. Van Slvke, V. P. Bond, E. P. Cronkite, J. S. Robertson, S. Cohn, L. M. Schiffer, R. A. Love, L. K. Dahl, G. C. Cotzias, V. G. Alcober, W. Calvo, and H,. Cottier, and Mr. A. Finn and Mr. W. J. Walsh. Wewish also to thank Mrs. G. De Paolo for her secretarial assistance and Mrs. M. Dienes for editorial help. References 1. Cronkite, E. P. et ac.. The Effects of lonizing Radiation on Human Beings: A Report on the Marshallese and Americans Accidentally Exposed to Radiation From Fallout and a Discussion of Radiation In- iz procedures instituted whenever possible. The ex- jury in the Human Being, U.S. Government Printing Office, Washington, D.C., 1956. . Bonn, V. P., Conarpo, R. A. Rosertson, J. S., and WebeEN, E. A. Jr., Medical Examination of Rongelap People Six Months After Exposure to Fallout, WT937, Operation Castle Addendum Report 4.1A, April 1955. 3. CRONKITE, E. P.. DUNHAM, C. L., GRIFFIN. D., McPHERSON. S. D.. and Woopwarp,. K. T., Twelve- Month Post-Exposure Survey on Marshallese Exposed to Fallout Radiation, BNL 384 (T-71), August 1955. 4. Conarpb, R. A.. Hucorns, C. E., Cannon, B., Lowrey, A.. and RicHaros, J. B., J.4d.M.A. 164, 1192-7 (1957). 5. Conarp, R. A., MEver, L. M., Ratt, J. E.. Lowrey, A., BacH. S. A., CANNON, B., CARTER, E., EICHER, M.. and HecHTeER, H.. March 1957 Medical Survey of Roneelap and Unrik People Three Years After Ex- posure to Radioactive Fallout, BNL 501 (T-119), June 1958. 6. Conarpb, R. A. ET AL., Medical Survey of Rongelap People, March 1958, Four Years After Exposure to Fallout, BNL 534 (T-135), May 1959. 7. Conaro, R. A. ET AL., Medical Survey of Rongelap People Five and Six Years After Exposure to Failout. BNL 609 (T-179), September 1960.

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