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Warren, Pa., Feb. 12, 1898.
To the Profession:
—Any physician knowing of cases in which tubercle bacilli were found in the sputum, without any other physical evidence of disease in the lungs, and having seen such cases for a period of several years, noticed no further progress of the disease, will confer a great favor on the undersigned by reporting the same to him. I desire to obtain evidence on the import of bacillus tuberculosus in the sputum.
Ball MV. Tubercle Bacillus. JAMA. 1898;XXX(8):446. doi:10.1001/jama.1898.02440600046017
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