Abstract

A culture technique for measuring the proliferative capacity of a class of human hemopoietic cells is presented. This method is used to assess the radio-sensitivity of this class of human hemopoietic cells, and to compare them directly to mouse hemopoietic cells tested in the same system. We conclude that the sensitivity of human bone marrow to irradiation as measured directly is of the same order as that predicted on the basis of experiments in mice.

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