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May 10, 1965

Cancer Research—It Moves Ahead As Scientists Report Across Nation

JAMA. 1965;192(6):25-26. doi:10.1001/jama.1965.03080190157054

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A re the particles seen in the blood of patients with leukemia in recent months in several laboratories actually viruses, as they appear to be?

If so, are they the cause of leukemia?

And what is the role of pleuropneumonia-like organisms (PPLO) also frequently found recently in leukemic tissue?

These were the questions most frequently raised by investigators during the annual spring flood of cancer research reports at scientific meetings across the nation. The sessions included the annual meeting of the American Association for Cancer Research in Philadelphia, the American Cancer Society's seminar for science writers and the American Radium Society meeting in New Orleans, and the Federation of American Societies for Experimental Biology in Atlantic City.

But, from all of these, the answers were conflicting.

At the ACS seminar, James T. Grace Jr., MD, assistant director and chief, Viral Oncology Section, Roswell Park Memorial Institute, said of the particles

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