1. A method for extracorporeal irradiation of the circulating blood has been developed.

2. Extracorporeal irradiation of the blood will produce a lymphopenia promptly which persists for weeks.

3. Heparin in high doses in the calf produces a lymphocytosis and neutrophilic leukocytosis.

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© 1962 by American Society of Hematology, Inc.
1962
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