peoplepill id: john-ross-callahan
JRC
United States of America
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John Ross Callahan
American dentist, dental researcher

John Ross Callahan

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Notable American people in healthcare and medicine

Gender:Male, Born in:Years 1850 to 1899

By work and/or country

Notable American Dentists

Gender:Male, Born in:Years 1850 to 1899
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John Ross Callahan
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