*
This article has been released for publication by the Division of Publications of the Bureau of Medicine and Surgery of the U. S. Navy. The opinions and views set forth in this article are those of the writer and are not to be considered as reflecting the policies of the Navy Department.
†
Presidential address delivered at the 37th meeting of the American Association for Cancer Research, Inc., at Atlantic City, New Jersey, March 11, 1946.
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©1946 American Association for Cancer Research.
1946
The Donner Foundation, Incorporated, Cancer Research Division
