24 man chain of small but detectable amounts of radioisotopes still present on theisland. Acknowledgments The success of a mission of this type depends on the cooperation and help of manyindividuals and organizations. Their numberis too large for each to be mentioned, but the authors wish to express their sincere appreciation to them ail, and in particular to someof the individuals whose efforts contributed so muchto the successful completion of the mission. Dr. Charles L. Dunham and his staff of the Division of Biology and Medicine, Atomic Energy Commission, were most helpful in coordination and expedition of arrangements with other governmental agencies. At Brookhaven National Laboratory weare indebted to Dr. Lee E. Farr, Director of the Medi- cal Department,for his guidance andassistance; to Dr. S. W. Lippincott for histopathological interpretation of the skin biopsies; and to Dr. E.P. Cronkite, Dr. V.P. Bond, and Dr. J.S. Robertson for help and advice on various aspects of the program. The Department of Defense and particularly the Department of the Navy, as in the past, contrib- uted mostvitally to the mission. The help of the Chief of Naval Operations and Commander, Hawaiian Sea Frontier, in furnishing an LST made possible the examination of the Utirik people and the smooth working of other transportation arrangements. Weare deeply grateful for the unfailing enthusiasm and assistance of Comdr. I.V. King (MSC) USN of the Naval Medical Research Institute, who acted as the Navy liaison officer throughout the planning and operative stages of the mission. Weare also grateful to Capt. E.O. Van der Aue (MC) USN, Commanding Officer, and Capt. J. Pollard (MC) USN of thar Institute for their enthusiastic support. At the Naval Radiological Defense Laboratory Capt. Richard S. Mandelkorn USN and Capt. A.R. Behnke (MC) USNwere helpful. Weare most grateful to Lt. James P. Nolan (MC) USNR, whoacted as Naval liaison to our group from the Hawaiian Sea Frontier. His untiring efforts in makinglogistic arrangements and assistance in carrying out physical examinations at Utirik Island were of immeasurable help to the medical team. Also Lt. Al Sprague, USN,ofthe staff of the Hawaiian Sea Frontier was most helpful in making arrangements for the team at Hawaii. Lt. Comdr. W.E. Smith, USN, Commanding Officer of the LST 859, and his officers and crew were of great assistance to the team on the voyage to Utirik. The conningof the ship through the treacherous waters of Utirik Lagoon was evidence of real seamanship. At Kwajalein, Capt. W.C. Short, Jr., USN, Commanding Officer of the Naval Station, and his staff were most helpful to the group. At Majuro weare most grateful to Mr. May- nard Neas, the District Administrator, Dr. A. Hicking, District Health Officer, Mrs. Ruth Martin, Administrator of the Marshall Islands Memorial Hospital, and their staff, who were of great assistance in supporting the operation. Wealso wish to express our appreciation to Trigar Ishoda, practitioner, and Nelson, technician, for their assistance in carrying out the examinations. References 1. Cronkite, E.P. et al., The Effects ofIontzing Radiation on Human Beings: A Report on the Marshallese and Americans Acetdentally Exposed to Radiation from Fatlout and a Discussion of Radiation Injury in the Human Being, U.S. GovernmentPrinting Office, Washington, D.C., 1956. 2. Koyoma,Y.et al., /ryo (published by Iryo Doko- kai, Medical Affairs Bureau, Ministry of Health and Welfare, Tokyo, Japan) 9, No. 1, 5-45 (1955). 3. Bond, V.P., Conard, R.A. Robertson, J.S., and Weden, E.A. Jr., Medical Examination ofRongelap People Six Months After Exposure to Fallout, WT-937, Operation Castle Addendum Report 4.1A, April 1955. 4. Cronkite, E.P., Dunham, C.L., Griffin. D., McPherson, S.D., and Woodward, K.T., Twelve-Month Post-Exposure Suroey on Marshallese Exposed to Fallout Radiation, BNL 384 (T-71), August 1955. 5. Conard, R.A., Huggins, C.E., Cannon, B., Lowery, A., and Richards, J.B., Medical sur- vey of Marshallese two years after exposure to

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