OY 17 Head, Division of Biology and Medicine, AEC, and his staff were most helpful in coordinating and expediting arrangements with other governmental agencies. The cooperation and assistance of the Department of the Navy, as in the past, was a most vital aspect of this operation. At the Naval Medical Research Institute the enthusiastic support of Capt. E.O. Van der Aue (MC) USN, Commanding Officer, and Capt. T.L. Willmon are greatly appreciated. We are particularly grateful to Lt. Comdr, I.V. King (MSC) USN, for assistance in administrative matters. We are most grateful to Mr. Maynard Neas, the District Administrator at Majuro, Marshall Islands, andtoDr. A. Hicking and Mrs, Ruth Martin and the staff of the Marshall Islands Memorial Hospital for their invaluable assistance and hospitality in housing and providing laboratory and examining facilities. At Brookhaven National Laboratory we are indebted to Dr. L.E. Farr, Director of the Medical Department, Dr. E,P. Cronkite, Dr. V.P. Bond, and Dr, J.S. Robertson for their help and advice on various phases of the program, to Dr. S.W. Lippincott for assistance in histopathological interpretation of skin changes, andto Miss Mildred Pavelec for preparation of tissues. We are also grateful to Col. C.F. Tessmer (MC) USA, of the Armed Forces Institute of Pathology and Dr. E.A. Alpin of the U.S. Naval Radiological Defense Laboratory for help in histopathological interpretation. The assistance of Dr. W.C. Moloney and Miss Lila Fliegelman of the Boston City Hospital in carrying out the alkaline phosphatase analysis of blood smears is greatly appreciated. : The authors wish to thank Lt. A.G. Schrodt (MSC) USA,and Pvt. A. Burstein, USA, of Walter Reed Institute of Research, Dr. John Harley and Mr. Edward Hardy of the New York Operations Office of the AEC, and Dr, Stan Cohn, USNRDL, for assistance in the radiochemical analyses. Capt. R.A. Hinners, USN, Commanding Officer, USNRDL, Capt. A.R. Behnke (MC) USN, and Lt. J.A. Kelley (MSC) USN, of that laboratory were most helpful in assisting the team on'the West Coast. In the Department of the Navy we are most grateful to the Bureau of Medicine and Surgery, Bureau of Ships, and Chief of Naval Operations for their support. We especially wish to thank Capt. P.C. Staley, USN, Commanding Officer, Naval Station, Kwajalein, for his cooperation and provision of transportation, and also the dispensary staff there for their assistance. The Commanding General and his staff at Tripler General Hospital, Hawaii, also gave generous support to the group. References 1, Cronkite, E.P., Bond, V.P., and Dunham, C.L., Editors, The effects of ionizing radiation on human beings: A report on the Marshallese and Americans accidentally exposed to radiation from fallout and a discussion of radiation injury in the human being. U.S. Government Printing Office, Washington, D.C., 1956. z. Cronkite, E.P., et_al., Study of response of human beings accidentally exposed to fallout radiation. WT-923, Operation Castle Final Report on Project 4.1, 1954. 3. Conard, R.A., al., Skin lesions, epilation and nail pigmentation in Marshallese and Americans accidentally contaminated with radioactive fallout. Naval Medical 4, Research Institute Report No. NM 006012.04.82, 29 August 1955. Bond, V.P., Conard, R.A., Robertson, J.S., and Weden, E.A., Jr., Medical examina- tion of Rongelap people six months after exposure to fallout. Castle Addendum Report 4.1A, April 1955. 5. WT-937, Operation Cronkite, E,.P., Dunham, C.L., Griffin, D., McPherson, S.D., and Woodward, K.T., Twelve-month postexposure survey on Marshallese exposed to fallout radiation. BNL 384 (T-71), August 1955.

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