164 s.-A. KILLMANN AND OTHERS 4. Good general medical care and close supervision by personnel trained in treating patients with pancytopenia. 5. No prophylactic use of antibiotics because this may result in unnecessary developmentofresistant bacteria. REFERENCES Brucer. M., ed. (1959) The acute radiation syndrome. A medical report on the Y-12 accident, June 16, 1958, Oak Ridge, Oak Ridge Institute of Nuclear Studies (United States Atomic Energy Commission, ORINS-25) Bond, V. P., Fliedner, T. M., Cronkite, E. P. & Andrews, G. (1961) J. Lad. clin. Med., in press Bond, V. P., Fliedner, T. M., Cronkite, E. P., Rubini, J. R., Brecher, G. & Schork,P. (1959) Acta haemat. (Basel), 21, | Cronkite, E. P. & Bond, V. P. (1960) U. S. armed Forc. med. J., 11, 249 Cronkite, E. P., Bond, V. P. & Dunham, C. L., ed. (1956) Someeffects of ionizing radiution on human beings, Washington, D. C., United States Government Printing Office (United States Atomic Energy Commission, TID 5358) Fink, K., Henderson, R. B. & Fink, R. M. (1952) J. biol. Chem., 197, 441 Fink, K., Cline, R. M., Henderson, R. B. & Fink, R. M. (1956) J. diol. Chem., 221, 725 Fliedner, T. M., Cronkite, E. P., Bond, V. P., Rubini, J. R. & Andrews, G. 1959 Acta haemat. (Basel), 22, 65 Jammet, H.et al. (1959) Rev. frang. Et. clin. biol., 4, 210 Killmann, S.-A., Cronkite, E. P., Fliedner, T. M. & Bond, V. P. (1961 a) Blood, in press Killmann, S.-A., Rubini, J. R., Cronkite, E. P. & Bond, V. P. (1961 b) Acta Aaemar. ( Basel), 25, 81 Kretchmar, A. L. (1959) Fed. Proc., 18, 487 (abstract of paper presented before the 44th Annual Meeting of the American Society for Experimental Pathology, Atlantic City, N. J., April 13-17, 1959) LeRoy, G. V. (1950) Arch. intern. Med., 86, 691 Mathé, G. et al. (1959) Rev. frang. Et. clin. biol., 4, 226 Rubini, J. R., Cronkite, E. P., Bond, V. P. & Fliedner, T. M. (1959) Proc. Soc. exp. Biol. (N. Y.), 100, 130 Sorensen, D. K., Bond, V. P., Cronkite, E. P. & Perman, V. P. (1960) Radiat. Res., 13,669 Thoma, G. E, & Wald, N. (1959) J. eccup. Med., 1, 421 £57 Thomas, E. D., Lochte, H.L., jr. & Ferrebee, J. W. (1959) Blood, 14, 1

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