7 COMPARISON POPULATIONS During the first 2 years, two separate groups of Marshallese people were used for comparison, cach of comparable size tothe exposed Rongelap group and matched for age and sex. However,this population was found to be unstable, with a large attrition rate over the 2 years, which made it un- satisfactory. At the time of the 3-year survey, it was found that during the preceding 12 months the Rongclap population at Majura Atoll had doubled because of the Influx of relatives who had come back from other islands to live with them.” Since the people are of the same stock gencti- cally, they are uniqucly appropriate to serve as a comparison population and have, therefore, been uscd since 1957. 1962 Survey — Organization and Procedures The medical team consisted of 5 medical special- ists from the U.S., 2 Marshallese practitioners from the Trust Territory, and 8 technicians, 4 from the U.S. and 4 from the Trust Territory (Figure 2). The medical equipment had been sent out to the These people had been away from Rongelap Atoll at the time of the accidental exposure. This group. Islands prior to the team’s arrival, and preliminary matched reasonably well for age and sex and was2 preparations had been made for logistic support of comparablesize, Since the return of the peoples ae of the operation with officials of the Navy Pacific a; Missile Range Group and the Trust Territory of ie: the Pacific Islands, 2. ne oe Figure 2. Medical team. Left to right, front row: E. Adamik, L. Meyer, W. Moloney, R. Conard, A. Lowrey, A. Hicking, D. Clarcus: standing: K. Mizutoni, W. Scott, I. Jones, S. Shoniber, E. Riklon, K. Kittien. A. Obten. (W. W. Sutow is not in the picture.)